Attack Damage

Attack damage is the amount of damage a unit is shown to deal with a regular attack. A unit's total attack damage is the sum of its main attack damage (white) and bonus attack damage (green). Attack damage is modified by many different effects in the game and ends up going through a number of steps in order to determine how much damage an attack actually deals as its overall or total attack damage.

Total attack damage

File:Dota2 PWj2H2XKXO.png

Properties of a level 1 Sniper with Blades of Attack: Sniper's base attack damage varies by 6; main attack damage is white, bonus attack damage green.

Calculating the total damage of an attack involves using many different multipliers and values. Total attack damage is synonymous with how much health a target immediately loses as a direct result of the attack. Some on-hit effects that are not affected by critical strike are still considered part of attack damage, and some are not.

Formula:

Damage =

{ [Main Attack Damage × (1 + Σ Percentage Bonuses) + Flat Bonuses]

× Crit Multiplier - Blocked Damage }

× Armor Multipliers

× General Damage Multipliers

Base attack damage

Base attack damage is the part of the main attack damage that stays the same throughout a game. It consists of two values, a minimum and maximum amount. Every time an attack is issued, a random value between these two extremes is chosen to help decide the damage output. The most extreme hero example of this is Chaos Knight, with base attack damage ranging between 29 and 59, causing his damage output to be somewhat unpredictable (or at least much less predictable than other heroes). This range of 30 is always part of his attack calculations, no matter how many attributes or how much bonus attack damage he acquires.

Main attack damage

Main attack damage is the damage value shown in white numbers on a hero's statistics consisting of the base attack damage with the damage granted by a hero's primary attribute on top. A hero's main attack damage can only be increased by raising its primary attribute, or by very few specific abilities. Attribute points can be acquired by leveling up, or by using specific items, abilities, or talents that raise attributes.

Formula:

main attack damage = base attack damage + total primary attribute points + ability bonuses.

Hero	Base Attack Damage				Main Attack Damage (LVL1)			Max Main Attack Damage (LVL30)
	Range	Min	Max	⌊Avr.⌋	Min	Max	⌊Avr.⌋	Min	Max	⌊Avr.⌋
Abaddon		{{{min}}}	{{{max}}}
Alchemist		{{{min}}}	{{{max}}}
Ancient Apparition		{{{min}}}	{{{max}}}
Anti-Mage		{{{min}}}	{{{max}}}
Arc Warden		{{{min}}}	{{{max}}}
Axe		{{{min}}}	{{{max}}}
Bane		{{{min}}}	{{{max}}}
Batrider		{{{min}}}	{{{max}}}
Beastmaster		{{{min}}}	{{{max}}}
Bloodseeker		{{{min}}}	{{{max}}}
Bounty Hunter		{{{min}}}	{{{max}}}
Brewmaster		{{{min}}}	{{{max}}}
Bristleback		{{{min}}}	{{{max}}}
Broodmother		{{{min}}}	{{{max}}}
Centaur Warrunner		{{{min}}}	{{{max}}}
Chaos Knight		{{{min}}}	{{{max}}}
Chen		{{{min}}}	{{{max}}}
Clinkz		{{{min}}}	{{{max}}}
Clockwerk		{{{min}}}	{{{max}}}
Crystal Maiden		{{{min}}}	{{{max}}}
Dark Seer		{{{min}}}	{{{max}}}
Dark Willow		{{{min}}}	{{{max}}}
Dawnbreaker		{{{min}}}	{{{max}}}
Dazzle		{{{min}}}	{{{max}}}
Death Prophet		{{{min}}}	{{{max}}}
Disruptor		{{{min}}}	{{{max}}}
Doom		{{{min}}}	{{{max}}}
Dragon Knight		{{{min}}}	{{{max}}}
Drow Ranger		{{{min}}}	{{{max}}}
Earth Spirit		{{{min}}}	{{{max}}}
Earthshaker		{{{min}}}	{{{max}}}
Elder Titan		{{{min}}}	{{{max}}}
Ember Spirit		{{{min}}}	{{{max}}}
Enchantress		{{{min}}}	{{{max}}}
Enigma		{{{min}}}	{{{max}}}
Faceless Void		{{{min}}}	{{{max}}}
Grimstroke		{{{min}}}	{{{max}}}
Gyrocopter		{{{min}}}	{{{max}}}
Hoodwink		{{{min}}}	{{{max}}}
Huskar		{{{min}}}	{{{max}}}
Invoker		{{{min}}}	{{{max}}}
Io		{{{min}}}	{{{max}}}
Jakiro		{{{min}}}	{{{max}}}
Juggernaut		{{{min}}}	{{{max}}}
Keeper of the Light		{{{min}}}	{{{max}}}
Kunkka		{{{min}}}	{{{max}}}
Legion Commander		{{{min}}}	{{{max}}}
Leshrac		{{{min}}}	{{{max}}}
Lich		{{{min}}}	{{{max}}}
Lifestealer		{{{min}}}	{{{max}}}
Lina		{{{min}}}	{{{max}}}
Lion		{{{min}}}	{{{max}}}
Lone Druid		{{{min}}}	{{{max}}}
Luna		{{{min}}}	{{{max}}}
Lycan		{{{min}}}	{{{max}}}
Magnus		{{{min}}}	{{{max}}}
Marci		{{{min}}}	{{{max}}}
Mars		{{{min}}}	{{{max}}}
Medusa		{{{min}}}	{{{max}}}
Meepo		{{{min}}}	{{{max}}}
Mirana		{{{min}}}	{{{max}}}
Monkey King		{{{min}}}	{{{max}}}
Morphling		{{{min}}}	{{{max}}}
Muerta		{{{min}}}	{{{max}}}
Naga Siren		{{{min}}}	{{{max}}}
Nature's Prophet		{{{min}}}	{{{max}}}
Necrophos		{{{min}}}	{{{max}}}
Night Stalker		{{{min}}}	{{{max}}}
Nyx Assassin		{{{min}}}	{{{max}}}
Ogre Magi		{{{min}}}	{{{max}}}
Omniknight		{{{min}}}	{{{max}}}
Oracle		{{{min}}}	{{{max}}}
Outworld Destroyer		{{{min}}}	{{{max}}}
Pangolier		{{{min}}}	{{{max}}}
Phantom Assassin		{{{min}}}	{{{max}}}
Phantom Lancer		{{{min}}}	{{{max}}}
Phoenix		{{{min}}}	{{{max}}}
Primal Beast		{{{min}}}	{{{max}}}
Puck		{{{min}}}	{{{max}}}
Pudge		{{{min}}}	{{{max}}}
Pugna		{{{min}}}	{{{max}}}
Queen of Pain		{{{min}}}	{{{max}}}
Razor		{{{min}}}	{{{max}}}
Riki		{{{min}}}	{{{max}}}
Rubick		{{{min}}}	{{{max}}}
Sand King		{{{min}}}	{{{max}}}
Shadow Demon		{{{min}}}	{{{max}}}
Shadow Fiend		{{{min}}}	{{{max}}}
Shadow Shaman		{{{min}}}	{{{max}}}
Silencer		{{{min}}}	{{{max}}}
Skywrath Mage		{{{min}}}	{{{max}}}
Slardar		{{{min}}}	{{{max}}}
Slark		{{{min}}}	{{{max}}}
Snapfire		{{{min}}}	{{{max}}}
Sniper		{{{min}}}	{{{max}}}
Spectre		{{{min}}}	{{{max}}}
Spirit Breaker		{{{min}}}	{{{max}}}
Storm Spirit		{{{min}}}	{{{max}}}
Sven		{{{min}}}	{{{max}}}
Techies		{{{min}}}	{{{max}}}
Templar Assassin		{{{min}}}	{{{max}}}
Terrorblade		{{{min}}}	{{{max}}}
Tidehunter		{{{min}}}	{{{max}}}
Timbersaw		{{{min}}}	{{{max}}}
Tinker		{{{min}}}	{{{max}}}
Tiny		{{{min}}}	{{{max}}}
Treant Protector		{{{min}}}	{{{max}}}
Troll Warlord		{{{min}}}	{{{max}}}
Tusk		{{{min}}}	{{{max}}}
Underlord		{{{min}}}	{{{max}}}
Undying		{{{min}}}	{{{max}}}
Ursa		{{{min}}}	{{{max}}}
Vengeful Spirit		{{{min}}}	{{{max}}}
Venomancer		{{{min}}}	{{{max}}}
Viper		{{{min}}}	{{{max}}}
Visage		{{{min}}}	{{{max}}}
Void Spirit		{{{min}}}	{{{max}}}
Warlock		{{{min}}}	{{{max}}}
Weaver		{{{min}}}	{{{max}}}
Windranger		{{{min}}}	{{{max}}}
Winter Wyvern		{{{min}}}	{{{max}}}
Witch Doctor		{{{min}}}	{{{max}}}
Wraith King		{{{min}}}	{{{max}}}
Zeus		{{{min}}}	{{{max}}}

Bonus attack damage

Bonus attack damage comprises the green number next to main attack damage. It comes in two types:

• Flat Bonus: adds a flat number of damage to the unit's damage total. Examples: Phase Boots, Necromastery, Insatiable Hunger
• Percentage Bonus: adds an amount of bonus attack damage equal to a percentage of the affected unit's main attack damage, or total attack damage, depending on the ability. Examples: Vladmir's Offering, Lunar Blessing, Packleader's Aura
• While bonus attack damage is usually positive, it can also use a negative value, serving to reduce a unit's net attack damage. Examples: Static Link, Anchor Smash, Fade Bolt

Formula

bonus attack damage = sum of bonuses + sum of reductions.

Critical strike multiplier

Critical Strike is an attack modifier that multiplies the total attack damage certain factor. If an attack activates more than one critical strike, only the highest multiplier is applied.

Main Article: Critical Strike

Blocked damage

Damage Block is a passive ability that gives the unit a chance to block a certain number of physical damage from an attack. If an attack activates more than one damage block ability, only the highest block value is applied.

Main Article: Damage Block

Armor value multiplier

The target's armor influences the attack damage by a factor that asymptotically lies between 0 and 2 and is 1 for a target that has no armor.

Formula

Armor

 

Old Mechanics

 

Changelogs

 

“

▶️ Armored to the teeth! — Clockwerk

”

Armor is a stat that reduces (or increases, if negative) physical damage a unit takes from abilities and attacks. Every unit is capable of gaining or losing armor, and most units start with a small amount of base armor, some even starting with negative armor. A hero's armor can be passively increased with agility via leveling up, certain items, talents and some abilities. Armor of any unit can also be temporarily increased or reduced with some abilities.

Each point of agility increases a hero's armor by 0.167 or $\tfrac{1}{6}$.

• Total armor can be defined as
  • Main Armor
    • × % Armor Negation Multiplier
  • ± Flat Bonus Armor Values

Base Armor

Base armor is the part of the main armor that never changes throughout a game. It consists of one fixed value set for each unit individually. The base armor of a unit can be a negative number. Since only heroes have agility, the HUD of all non-hero units shows their base armor.

Heroes

Heroes	Armor
	-3
	-2
	-1
	0
	1
	2
	2.5
	3
	4
	5

Creeps

Units	Armor
Boar, Hill Troll, Hill Troll Priest, Kobold, Lycan Lane Wolf, Lycan Wolf, Mega Siege Creep, Mud Golem, Ogre Frostmage, Ranged Creep, Satyr Banisher, Shard Golem, Siege Creep, Skeleton Warrior, Spiderite, Spiderling, Super Siege Creep, Treant, Undying Zombie	0
Forged Spirit	0/1/2/3/4/5/6/7
Centaur Courser, Fell Spirit, Giant Wolf, Harpy Scout, Hill Troll Berserker, Kobold Soldier, Mega Ranged Creep, Minor Imp, Ogre Bruiser, Super Ranged Creep, Vhoul Assassin	1
Ancient Black Drake, Flagbearer Creep, Ghost, Harpy Stormcrafter, Kobold Foreman, Melee Creep, Satyr Mindstealer, Satyr Tormenter, Wildwing	2
Eidolon	2/3/4/5
Tormentor	20
Alpha Wolf, Ancient Ice Shaman, Ancient Rumblehide, Ancient Thunderhide, Hellbear, Mega Flagbearer Creep, Mega Melee Creep, Super Flagbearer Creep, Super Melee Creep, Wraith King Skeleton	3
Roshan	30
Ancient Black Dragon, Ancient Rock Golem, Centaur Conqueror, Dark Troll Summoner, Hellbear Smasher, Necronomicon Archer, Necronomicon Warrior, Wildwing Ripper	4
Hawk	5
Warpine Raider	6
Ancient Frostbitten Golem	7
Ancient Granite Golem	8

Summons

Summons	Armor
Astral Spirit	0
Familiar	0/2/4
Spirit Bear	0/2/4/6
Fire	0/8/16
Storm	2
Mars Soldier	3
Void	3/4/5
Earth	3/5/7
Warlock Golem	8/12/14

Main Armor

Main armor is the armor value shown in white numbers near the shield icon in the HUD, consisting of base armor and the armor granted by a hero's agility. The only way to improve a hero's main armor is to increase its agility, which is gained by leveling up, acquiring certain items, or with the help of certain abilities.

Attribute	Bonus Main Armor
Agility	+0.167

The main armor is defined as

Main Armor = (Base Armor + (Σ Current)/6) × (1 - Armor Negation)

Hero Armor

Hero Base Level 1 Level 15 Level 25 Level 30 Abaddon 0 3.83 6.87 9.03 10.12 Alchemist 0 3.67 7.17 9.67 10.92 Ancient Apparition -1 2.33 7.47 11.13 12.97 Anti-Mage 1 5 11.53 16.2 18.53 Arc Warden 0 3.33 10.33 15.33 17.83 Axe -1 2.33 6.3 9.13 10.55 Bane 1 4.83 10.67 14.83 16.92 Batrider 2 4.5 7.77 10.1 11.27 Beastmaster -1 2 5.73 8.4 9.73 Bloodseeker 2 6 13.23 18.4 20.98 Bounty Hunter 5 8.5 14.57 18.9 21.07 Brewmaster 0 3.17 7.83 11.17 12.83 Bristleback 1 3.83 8.03 11.03 12.53 Broodmother -1 2 8.07 12.4 14.57 Centaur Warrunner -2 0.5 2.83 4.5 5.33 Chaos Knight 2 5 8.27 10.6 11.77 Chen -1 1.5 6.4 9.9 11.65 Clinkz 0 4.17 10.47 14.97 17.22 Clockwerk 1 3.17 8.07 11.57 13.32 Crystal Maiden 0 2.67 6.4 9.07 10.4 Dark Seer 2 5.17 9.37 12.37 13.87 Dark Willow 0 3 6.03 8.2 9.28 Dawnbreaker 2 4.33 8.3 11.13 12.55 Dazzle 0 3.33 6.6 8.93 10.1 Death Prophet 1 3.67 8.33 11.67 13.33 Disruptor 0 2.5 5.77 8.1 9.27 Doom 2 4.5 8 10.5 11.75 Dragon Knight 0 2.67 7.33 10.67 12.33 Drow Ranger 0 3.33 10.1 14.93 17.35 Earth Spirit 0 2.83 8.43 12.43 14.43 Earthshaker 2 4 7.27 9.6 10.77 Elder Titan 0 2.67 6.87 9.87 11.37 Ember Spirit 0 3.67 11.13 16.47 19.13 Enchantress 1 4.17 9.07 12.57 14.32 Enigma 1 3.33 5.67 7.33 8.17 Faceless Void 0 3.17 10.17 15.17 17.67 Grimstroke 0 3 7.43 10.6 12.18 Gyrocopter 2 6.33 13.57 18.73 21.32 Hoodwink 0 4 12.4 18.4 21.4 Huskar -1 0.67 4.17 6.67 7.92 Invoker -1 1.33 5.53 8.53 10.03 Io 1 3.33 7.07 9.73 11.07 Jakiro 1 3.5 6.3 8.3 9.3 Juggernaut 0 5.67 12.2 16.87 19.2 Keeper of the Light 0 2.5 6.23 8.9 10.23 Kunkka 2 4.33 8.07 10.73 12.07 Legion Commander 0 3 6.97 9.8 11.22 Leshrac 0 3.83 10.37 15.03 17.37 Lich -1 1.83 6.5 9.83 11.5 Lifestealer 1 4.17 10.23 14.57 16.73 Lina 0 3.83 9.43 13.43 15.43 Lion 0 2.5 6 8.5 9.75 Lone Druid 0 3.33 8 11.33 13 Luna 2 6 13.93 19.6 22.43 Lycan 0 3 7.2 10.2 11.7 Magnus 1 2.5 7.17 10.5 12.17 Marci 0 3.33 7.53 10.53 12.03 Mars -1 2.33 6.3 9.13 10.55 Medusa -1 2.67 11.07 17.07 20.07 Meepo 4 6.83 11.73 15.23 16.98 Mirana -2 2 7.83 12 14.08 Monkey King 2 5.83 14.47 20.63 23.72 Morphling -2 2 11.1 17.6 20.85 Muerta -1 2.33 8.63 13.13 15.38 Naga Siren 1 4.5 12.2 17.7 20.45 Nature's Prophet 0 2.33 9.8 15.13 17.8 Necrophos 2 4 7.03 9.2 10.28 Night Stalker 2 5 10.13 13.8 15.63 Nyx Assassin 1 4 9.83 14 16.08 Ogre Magi 4 6.33 9.83 12.33 13.58 Omniknight 2 4.5 9.17 12.5 14.17 Oracle 1 3.5 7.47 10.3 11.72 Outworld Destroyer 2.5 6.17 9.9 12.57 13.9 Pangolier 2 5 10.83 15 17.08 Phantom Assassin 1 4.5 12.43 18.1 20.93 Phantom Lancer -1 3.33 9.87 14.53 16.87 Phoenix -1 1 4.5 7 8.25 Primal Beast 2 4.5 6.83 8.5 9.33 Puck -3 0.67 6.5 10.67 12.75 Pudge -1 1.33 4.6 6.93 8.1 Pugna 0 3.5 6.53 8.7 9.78 Queen of Pain 0 3.67 9.5 13.67 15.75 Razor 0 4 10.53 15.2 17.53 Riki 0 5 10.6 14.6 16.6 Rubick 1 4.83 10.67 14.83 16.92 Sand King 1 4.17 8.37 11.37 12.87 Shadow Demon 0 3 8.13 11.8 13.63 Shadow Fiend 1 5.17 13.33 19.17 22.08 Shadow Shaman 3 5.67 9.4 12.07 13.4 Silencer 0 3.67 9.27 13.27 15.27 Skywrath Mage -2 0.17 2.03 3.37 4.03 Slardar 3 5.83 11.43 15.43 17.43 Slark 0 3.5 7 9.5 10.75 Snapfire 1 3.67 6.47 8.47 9.47 Sniper -1 3.5 10.97 16.3 18.97 Spectre 0 4.17 9.07 12.57 14.32 Spirit Breaker 1 3.83 7.8 10.63 12.05 Storm Spirit 1 4.67 10.73 15.07 17.23 Sven -1 2.5 7.63 11.3 13.13 Techies 2 4.33 7.37 9.53 10.62 Templar Assassin 0 3.83 11.3 16.63 19.3 Terrorblade 5 8.67 18 24.67 28 Tidehunter 0 2.5 6 8.5 9.75 Timbersaw 0 2.67 5.7 7.87 8.95 Tinker 2 4.83 8.1 10.43 11.6 Tiny 0 0 0 0 0 Treant Protector -1 1.5 5.7 8.7 10.2 Troll Warlord -1 2.83 10.53 16.03 18.78 Tusk 1 4.83 9.73 13.23 14.98 Underlord 3 5 8.73 11.4 12.73 Undying 1 2.67 5.47 7.47 8.47 Ursa 1 4 10.53 15.2 17.53 Vengeful Spirit 0 3.5 8.4 11.9 13.65 Venomancer 0 4 8.67 12 13.67 Viper -2 1.5 7.8 12.3 14.55 Visage -1 0.83 3.17 4.83 5.67 Void Spirit -1 2.17 7.3 10.97 12.8 Warlock 1 2.67 5 6.67 7.5 Weaver 1 3.83 11.07 16.23 18.82 Windranger 0 3.17 6.43 8.77 9.93 Winter Wyvern 1 3.67 7.17 9.67 10.92 Witch Doctor 0 2.17 5.43 7.77 8.93 Wraith King -1 1.67 5.63 8.47 9.88 Zeus 2 3.83 6.63 8.63 9.63

Main Armor Sources

These abilities directly manipulate agility points and therefore it affects main armor instead.

Sources affecting Main Armor

• Attributes – Attribute Bonus
• Alchemist – Aghanim's Scepter Synth
• Apex – Primary Attribute Bonus
• Drow Ranger – Marksmanship
• Magnus – Reverse Polarity¹
• Morphling – Adaptive Strike (Agility)
• Riki – Tricks of the Trade
• Slark – Essence Shift
• Power Treads – Switch Attribute
• Phantom Lancer – Phantom Rush
• Morphling – Morph^2a
• Vambrace – Switch Attribute
• Morphling – Attribute Shift (Strength Gain)
• Timbersaw – Whirling Death³

¹ Requires talent.

^2a Requires Aghanim's Scepter.

^2b Requires Aghanim's Shard.

³ Only affects agility and universal heroes.

Armor Negating Sources

Some abilities negate or ignore a unit's main armor by reducing or increasing armor based on the unit's main armor, effectively removing a percentage of the armor on the target. Armor negation only affects the armor value of units, their defense class is unaffected and still reduces damage normally.

Armor Negating Sources

• Drow Ranger - Marksmanship
  
  Proc Chance: 15%/20%/25%
  Main Armor Reduction: 100%
  Has a chance to completely ignore the target's main armor value on attack, dealing damage as if they had 0 main armor.
• Elder Titan - Natural Order
  
  Base Armor Reduction: 40%/60%/80%/100%
  The effects is provided by an aura, affects nearby enemies. The reduction is based on the enemies' main armor. The debuff lingers for 1 second.

Example

How much main armor Terrorblade with a Blade of Alacrity at Level 8 has?

Base Armor: 5

Base Agility and agility gain: 22 and 4 per level

Blade of Alacrity bonus agility: 10

$\begin{align} \text{Main Armor} &= 5 + \overbrace{\frac{ 10 + 22 + 4 \times 7}{6} }^\text{Agility} \\ &= 15 \end{align}$

Terrorblade has a total of 15 main armor in this example.

Bonus Armor

Bonus armor is the armor value shown in green numbers with a plus on the left, right after the white armor number on a unit's statistics. Whenever an armor granting item or armor increasing ability shows a +Value Armor, e.g. Blade Mail +7 Armor, it increases the bonus armor of the affected unit.

Probably the most important difference between main and bonus armor is that illusions only benefit from main armor, although their HUD still shows the bonus armor just like on other heroes, to make them less obvious to the enemy.

Sources of multiple bonus armor stack additively.

Armor Negation sources do not affect bonus armor.

Example1

How much total armor does a Terrorblade with a Blade of Alacrity and Blade Mail at Level 8 have?

Base Armor: 5

Base Agility and gain: 22 + 4

Blade of Alacrity bonus agility: 10

Blade Mail bonus armor: 7

$\begin{align} \text{Armor} &= \underbrace{ 5 + \overbrace{\frac{ 10 + 22 + 4 \times 7}{6} }^\text{Agility} }_\text{Main Armor} + 7 \\ &= 15 + 7 \\ &= 22 \end{align}$

Terrorblade has 22 total armor in this example.

Example 2

Terrorblade from the previous example is now affected by Level 3 Natural Order. How much total armor does he have now?

Level 3 Natural Order Armor Negation: 80%

$\begin{align} \text{Armor} &= \underbrace{ \left( 5 + \overbrace{\frac{ 10 + 22 + 4 \times 7}{6} }^\text{Agility} \right) \times \overbrace{ (1 - 0.8) }^\text{Main Armor Negation} }_\text{Main Armor} + 7 \\ &= \underbrace{ 15 \times (0.2) }_\text{Main Armor} + 7 \\ &= 10 \end{align}$

Terrorblade has 10 total armor in this example.

Modifying Armor

A lot of abilities and items have abilities that grant or reduce armor.

These changes only affect bonus armor. Reductions can nevertheless bring total armor into negative values if main armor is sufficiently small.

Armor Increasing Sources

Armor Increasing Sources

• Ancient Black Dragon – Dragonhide Aura
• Axe – Berserker's Call
• Axe – Battle Hunger^2a
• Axe – Culling Blade
• Chen – Divine Favor
• Crystal Maiden – Freezing Field
• Dazzle – Bad Juju
• Dragon Knight – Dragon Blood
• Elder Titan – Astral Spirit
• Enchantress – Enchant^{1 3}
• Lone Druid – Spirit Link
• Lone Druid – True Form
• Monkey King – Wukong's Command
• Ogre Frostmage – Ice Armor
• Oracle – False Promise¹
• Primal Beast – Uproar
• Razor – Static Link¹
• Roshan – Strength of the Immortal
• Skywrath Mage – Shield of the Scion
• Slardar – Guardian Sprint^2a
• Sven – Warcry
• Timbersaw – Reactive Armor
• Tiny – Grow
• Treant Protector – Living Armor
• Towers – Tower Protection
• Troll Warlord – Berserker's Rage
• Vengeful Spirit – Wave of Terror¹
• Visage – Gravekeeper's Cloak^{1 4}
• Wildwing Ripper – Toughness Aura

¹ Requires talent.

^2a Requires Aghanim's Scepter.

^2b Requires Aghanim's Shard.

³ Affects the player-controlled creep.

Armor Increasing Item Sources

• Armlet of Mordiggian – Unholy Strength
• Assault Cuirass – Assault Aura
• Buckler – Buckler Aura
• Craggy Coat – Toughen Up
• Guardian Greaves – Guardian Aura
• Solar Crest – Shine
• Helm of the Dominator – Dominate¹
• Helm of the Overlord – Dominate¹
• Vladmir's Offering – Vladmir's Aura

¹ Affects the player-controlled creep.

Talents

Armor

Ability
Passive

Affects
Self

There is no description for this ability.

Armor Bonus: Varies

• Grants a flat armor bonus.

• The following values exist:
  • 2/3/4/5/6/7/8/9/10/12/15/20/30

The following heroes have a talent that grants them bonus armor.

Bonus	Level 10		Level 15		Level 20		Level 25
	Left	Right	Left	Right	Left	Right	Left	Right
Armor	+4	+5 +5

Besides these, the following heroes have talents which increase the armor of the units they summon

Specific Summons Armor Bonus Talent

• Lone Druid - Talent by Level 15 Left
  
  +7 Spirit Bear Armor:
  Bonus armor.
• Warlock - Talent by Level 25 Right
  
  +20 Chaotic Offering Golems Armor:
  Bonus armor.

Items

The following items increase a unit's armor. The effects are limited to the item's owner, which must have the item equipped.

Items that provide armor bonus by flat amount and Agility:

Bonus Agility and Bonus Armor

Item	Value	Item Cost	Cost/Value Point
Defiant Shell	8.17	N/A	N/A
Helm of the Dominator	7	2625	375
Helm of the Overlord	10.5	5725	545.24
Shiva's Guard	15.83	5175	326.84
Solar Crest	4.67	2700	578.57
Spirit Vessel	3	2780	926.67
Urn of Shadows	2.33	880	377.14
Veil of Discord	4.67	1725	369.64
Wraith Band 1	2.83	505	178.24
Wraith Band 2	5.67	505	89.12

These items have a flat armor bonus to the hero who has them equipped.

Flat Bonus Armor

Item	Value	Item Cost	Cost/Value Point
Arcane Ring	2	N/A	N/A
Arcanist's Armor	5	N/A	N/A
Armlet of Mordiggian	6	2500	416.67
Assault Cuirass	10	5125	512.5
Blade Mail	7	2100	300
Broom Handle	4	N/A	N/A
Buckler	1	425	425
Chainmail	4	550	137.5
Cloak of Flames	4	N/A	N/A
Craggy Coat	8	N/A	N/A
Crimson Guard	8	3725	465.63
Dragon Scale	5	N/A	N/A
Guardian Greaves	4	4950	1237.5
Helm of Iron Will	4	975	243.75
Lotus Orb	10	3850	385
Mekansm	4	1775	443.75
Nullifier	10	4375	437.5
Orb of Corrosion	3	900	300
Parasma	6	5975	995.83
Pavise	2	1400	700
Phase Boots	4	1500	375
Platemail	10	1400	140
Rattlecage	12	N/A	N/A
Ring of Protection	2	175	87.5
Soul Ring	2	805	402.5
Vladmir's Offering	2	2200	1100
Witch Blade	6	2775	462.5

These items increase the hero's armor through the agility they provide.

Agility Base Armor

Item	Value	Item Cost	Cost/Value Point
Aghanim's Scepter	1.67	4200	2520
Band of Elvenskin	1	450	450
Blade of Alacrity	1.67	1000	600
Book of Shadows	2.17	N/A	N/A
Bracer 1	0.33	505	1515
Bracer 2	0.67	505	757.5
Butterfly	5.83	5450	934.29
Circlet	0.33	155	465
Crown	0.67	450	675
Diadem	1	1000	1000
Diffusal Blade	2.5	2500	1000
Disperser	6.67	6100	915
Dragon Lance	2.5	1900	760
Eaglesong	4.17	2800	672
Ethereal Blade	1.33	5375	4031.25
Eye of Skadi	3.67	5300	1445.45
Ghost Scepter	0.83	1500	1800
Harpoon	1.67	4700	2820
Holy Locket	1.5	2350	1566.67
Hurricane Pike	3.33	4450	1335
Iron Branch	0.17	50	300
Khanda	1.33	5000	3750
Linken's Sphere	2.67	4800	1800
Magic Wand	0.5	450	900
Manta Style	4.33	4550	1050
Meteor Hammer	1	2850	2850
Mirror Shield	1.67	N/A	N/A
Ninja Gear	3.33	N/A	N/A
Null Talisman 1	0.33	505	1515
Null Talisman 2	0.67	505	757.5
Occult Bracelet	0.5	N/A	N/A
Phylactery	1.17	2400	2057.14
Pig Pole	0.83	N/A	N/A
Power Treads (Agility)	1.67	1400	840
Sange and Yasha	2.67	4050	1518.75
Slippers of Agility	0.5	140	280
Specialist's Array	1	N/A	N/A
Swift Blink	4.17	6800	1632
Ultimate Orb	2.5	2800	1120
Vambrace (Agility)	1.33	N/A	N/A
Vambrace (Intelligence)	0.33	N/A	N/A
Vambrace (Strength)	0.33	N/A	N/A
Yasha	2.67	2000	750
Yasha and Kaya	2.67	4000	1500

Armor Reducing Sources

Armor Reducing Sources

• Alchemist – Acid Spray
• Ancient Rock Golem – Weakening Aura
• Axe – Battle Hunger^2a
• Bristleback – Viscous Nasal Goo
• Bristleback – Hairball
• Chaos Knight – Reality Rift
• Dazzle – Bad Juju
• Forged Spirit – Melting Strike
• Lycan – Howl
• Naga Siren – Rip Tide
• Pangolier – Lucky Shot
• Razor – Eye of the Storm
• Razor – Static Link¹
• Shadow Fiend – Presence of the Dark Lord
• Slardar – Slithereen Crush^2b
• Slardar – Corrosive Haze
• Snapfire – Lil' Shredder
• Templar Assassin – Meld
• Tidehunter – Gush
• Vengeful Spirit – Wave of Terror
• Viper – Poison Attack^2b
• Weaver – The Swarm

¹ Requires talent.

^2a Requires Aghanim's Scepter.

^2b Requires Aghanim's Shard.

Armor Reducing Item Sources

• Assault Cuirass – Assault Aura
• Mask of Madness – Berserk
• Blight Stone – Lesser Corruption
• Desolator – Corruption
• Orb of Corrosion – Corrosion
• Orb of Destruction – Impeding Corruption
• Stygian Desolator – Greater Corruption

Armor Corruption

Armor Corruption is granted by choosing a Talent, that causes hero attacks to reduce armor of the attacked target.

Armor Corruption

Ability
Passive

Affects
Enemies

There is no description for this ability.

Armor Reduction: Varies

Duration: 10

Modifiers [?]

modifier_armor_corruption

Any

• Causes the hero's attacks to place a debuff on the target that reduces the target's armor.

• Successive attacks do not stack the debuff, but refresh the duration instead.

• The attacks first apply the debuff, then their own damage.

• Works against wards, buildings, and allied units.

• Fully stacks with any other items or other sources of Armor Corruption.

• The following armor reduction values exist:
  • 2.5/3/4/5

The following heroes have a talent that grants them Armor Corruption.

Bonus	Level 10		Level 15		Level 20		Level 25
	Left	Right	Left	Right	Left	Right	Left	Right
Armor Corruption					-4

Pure Damage

Main Articles: Damage Types and HP Removal

Pure Damage is a damage type that is not reduced by Armor or Magic Resistance. It is also not amplified by magical damage amplification abilities, fully ignores Armor and Damage Block. It does not affect invulnerable units.

There are a few sources that can manipulate Pure Damage, with Dispersion being one of them. This mechanic is called damage reduction. Pure damage affects units with Spell Immunity (because spell immunity does not block damage), but that does not mean that an ability that deals pure damage is able to target spell immune units.

Abilities Based on Armor

Armor Based Ability Effects

• Axe - Battle Hunger
  
  Armor as Damage per Second: 100% ( 200%)
  Non-Hero Armor Multiplier: 0.5
  Deals damage based on the hero's armor.

Damage Multiplier

All units, including buildings, have an inherent base armor value and attack class. Any physical damage dealt to a unit is multiplied by the damage multiplier, resulting in either damage reduction or increase depending on the target's armor value.

Damage Multiplier is also used to calculate a unit's Effective HP (EHP). The lower the damage multiplier, the higher the Effective HP of a unit, vice versa.

Armor Formula Base b	Armor Formula Factor f
1	0.06

For any real-valued armor, the damage multiplier is defined as

$\begin{align} D_{Mu} &= 1 - \displaystyle\frac{ f \times R }{ b + f \times \vert R \vert} \quad \& \quad 0 \leq D_{Mu} \leq 2 \\ \\ &= 1 - \displaystyle\frac{ 0.06 \times R }{ 1 + 0.06 \times \vert R \vert} \end{align}$

With DMu being the Damage Multiplier and R the armor value.

The damage multiplier limits are 0 and 2, for infinitely positive and negative armor, respectively. Expand the table below for more detailed information on how much positive and negative armor affects damage multiplier.

Examples

Armor (+)	Multiplier	Armor (-)	Multiplier
1	94%	-1	106%
2	89%	-2	111%
3	85%	-3	115%
4	81%	-4	119%
5	77%	-5	123%
6	74%	-6	126%
7	70%	-7	130%
8	68%	-8	132%
9	65%	-9	135%
10	63%	-10	138%
11	60%	-11	140%
12	58%	-12	142%
13	56%	-13	144%
14	54%	-14	146%
15	53%	-15	147%
16	51%	-16	149%
17	50%	-17	150%
18	48%	-18	152%
19	47%	-19	153%
20	45%	-20	155%
21	44%	-21	156%
22	43%	-22	157%
23	42%	-23	158%
24	41%	-24	159%
25	40%	-25	160%
26	39%	-26	161%
27	38%	-27	162%
28	37%	-28	163%
29	36%	-29	164%
30	36%	-30	164%
31	35%	-31	165%
32	34%	-32	166%
33	34%	-33	166%
34	33%	-34	167%
35	32%	-35	168%
36	32%	-36	168%
37	31%	-37	169%
38	30%	-38	170%
39	30%	-39	170%
40	29%	-40	171%
41	29%	-41	171%
42	28%	-42	172%
43	28%	-43	172%
44	27%	-44	173%
45	27%	-45	173%

Effective HP

Relationships between Effective HP%, damage multiplier and armor

The total amount of physical damage a unit can take due to the armor it has is known as Effective HP (or EHP). 16.66 armor adds 100% to EHP. This means a unit with 1000 health and 16.66 armor can take 2000 physical damage. The formula adds 6% EHP per point of armor regardless of the previous armor value.

EHP value has no diminished benefit as a player gaining 1 armor from 0 armor would increase EHP from 100% to 106%, while a player gaining 1 armor from 50 armor would increase EHP from 400% to 406%. This means each point of armor effects your HP and your survivability in the exact same way. On the other hand, the effectiveness of armor is much lower at negative values (refer to the attached graph). Total EHP trends downwards towards 50%, meaning a unit with 1000 health and infinitely low armor would still be able to take 500 physical damage. At this point, losing or gaining 1 armor has essentially no effect.

Armor	-40	-30	-20	-10	0	10	20	30	40
Effective HP	586.21	608.7	647.06	727.27	1000	1600	2200	2800	3400

This definition of EHP assumes all damage taken is physical. EHP against magical damage (such as Laguna Blade or Finger of Death) is modified by magic resistance.

Effective HP against physical damage is defined as

$E_{HP} = \displaystyle\frac{ C_{HP} }{ D_{Mu} }$

With CHP being the Current Health and DMu the Damage Multiplier.

Example 1

A Level 25 Sven has a total health of 2293.6 and 11.3 points of armor without any items. What is his effective HP against physical damage?

${\begin{aligned}D_{Mu}&=1-{\frac {0.06\times 11.3}{1+0.06\times \vert 11.3\vert }}\\\\&=0.595948\end{aligned}}$

Sven's damage multiplier is 0.595948 in this example.

${\begin{aligned}E_{HP}&={2293.6 \over 0.595948}\\\\&=3848.66\end{aligned}}$

Sven's effective HP against physical damage in this example is 3848.66.

Example 2

The same Level 25 Sven from the previous example (has a total health of 2293.6) is affected by a Level 3 Corrosive Haze, and his armor is now -8.7. What is his effective HP against physical damage?

${\begin{aligned}D_{Mu}&=1-{\frac {0.06\times (-8.7)}{1+0.06\times \vert -8.7\vert }}\\\\&=1.34297\end{aligned}}$

Sven's damage multiplier is 1.34297 in this example.

${\begin{aligned}E_{HP}&={2293.6 \over 1.34297}\\\\&=1707.86\end{aligned}}$

Sven's effective HP against physical damage in this example is 1707.86.

Recent Changes

Main Article: Armor/Changelogs

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Mechanics Main Heroes Unit Type (Heroes / Clones / Illusions) Complexity Attributes Table Buyback Level Roles Gold Experience Animations Stats Armor Attributes ( Strength / Agility / Intelligence) / Universal) Health & Mana (HP Regen & MP Regen) Magic Resistance Movement Speed / Slow Resistance Status Resistance Turn Rate Misc Creep Controling Death / Denying Vision Unit Size (Collision Size / Bound Radius / Selection Box / Model Size) Gib Type / Shades Adjectives Buildings Towers / Barracks / Ancient / Fountain Effigy Neutral Buildings (Outposts / Watchers / Twin Gates / Lotus Pools) Abilities Type Active / Passive / Autocast Aura Accuracy / Evasion Channeling Damage Barrier Damage Block Damage Manipulation Damage Over Time Talents Teleport Targeting Area No Target Point Unit Vector Combinations Casting Cast Range / Motion Buffer Cast Animation (Cast Point + Backswing) Cooldown Reduction (Flat / Current Flat / Percentage) Reset Charge-based Runes Bounty Rune Water Rune Wisdom Rune Power Runes ( Amplify Damage Rune / Arcane Rune / Haste Rune / Illusion Rune / Invisibility Rune / Regeneration Rune / Shield Rune) Misc Random Distribution Transformation Attack Damage Attack Damage Instant Attack Heroes Attack Classes Attack Range (Acquisition Range) Attack Speed (BAT / Interval) Damage Types (Physical / Magical / Pure / Instant Kill) Flags (HP Removal / No-reflection / No-Spell-Lifesteal / No-Spell-Amplification) Projectile Speed Spell Damage (Outgoing / Incoming) Modifiers Bash Cleave / Splash Corruption Critical Strike Lifesteal / Spell Lifesteal Mana Break On-hit Effects Misc Damage Instance Animation / Orb Walking Status Effects Disables Cyclone Disabling Orders Forced Movement (Knockback) / Upward Movement Fear (Hypnosis) Hide Hex Root Leash Stun Sleep Taunt Movement Move Speed Slow Flying Movement Phased / Tree Walk / Unobstructed Movement Other Attack Immune / Non-targetable Attack Speed Slow Debuff Immunity Spell Immunity Invulnerability Invisibility Blind Break Disarm Ethereal Silence Mute Trap Dispels Basic Strong Death Items Mechanics Courier Sharing / Selling Disassemble Recipes Neutral Item Drop

Main Article: Armor

Armor type multiplier

Depending on the combination of the attack damage type and armor types, an armor type multiplier modulates the attack damage.

General damage multipliers

Main Article: Damage manipulation

A few abilities such as Bristleback and Dispersion modify all incoming damage, including attack damage. Bulwark reduces attack damage specifically.

Attack damage types

There are several different types of attack damage, which determine how much damage a unit's attack deals against certain armor types. Each of the 4 different attack types deals either reduced, increased, or unchanged damage against each of the armor types, on top of it being also manipulated by the armor value of the target.

Example
A hero with 100 attack damage attacking a siege unit which has 0 armor deals 50 damage to it, because the attack type "hero" deals 50% less damage against the armor type "structure", which is the siege creeps' and all buildings' armor type. If the siege creep would gain 5 armor, the 100 damage attack would deal (100 * 0.8 * 0.5) = 40 damage. The same attack would deal 80 damage to a unit with any other armor type, since attack type hero deals full damage to them.

This table shows how much damage each attack damage type deals against each armor type, and which units use which attack damage type:

Attack Damage Type	Used by	Armor Type
		Hero	Basic	Structure
Hero	Heroes,	100%	100%	50%
Basic		75%	100%	70%
Pierce		50%	150%	35%
Siege		100%	100%	250%

Instant attacks

Several abilities make use of the hero's regular attacks. However, these attacks are instant. This means they do not use the hero's attack animation, are independent from attack speed and ignore the regular downtime between attacks. If an instant attack is performed by a ranged hero, it still uses their regular attack projectile for the attack, unless it is set not to. If an instant attack occurs while already attacking an enemy normally, it does not interfere with the regular attack. They do not interfere with any other actions of the hero either, meaning they do not interrupt movement, do not cancel spell casts and do not stop channeling spells of the hero.

Since instant attacks do not use attack animations and jump straight to the attack point, they cannot proc effects which react on the start of an attack, like Untouchable or Moment of Courage. However, they can proc effects which react on attack hit, such as Counter Helix and Retaliate, although there are some exceptions to this. Instant attacks may proc on-hit effects only when they are allowed to. An instant attack which is not allowed to proc attack modifiers is not allowed to proc on-hit effects either. Just like regular attacks, instant attacks also cause the attacking hero to get revealed if attacking from the Fog of War.

The following abilities make use of instant attacks:

• Lua error: Found no Cargo data for "Clinkz - Searing Arrows".
• Drow Ranger – Marksmanship²
• Ember Spirit – Sleight of Fist
• Faceless Void – Time Lock
• Buildings – Glyph of Fortification³
• Gyrocopter – Flak Cannon⁴
• Lua error: Found no Cargo data for "Gyrocopter - Side Gunner".
• Hoodwink – Acorn Shot
• Io – Tether¹
• Juggernaut – Omnislash⁶
• Juggernaut – Swiftslash⁶
• Legion Commander – Moment of Courage
• Mars – God's Rebuke
• Medusa – Split Shot⁵
• Monkey King – Boundless Strike
• Morphling – Waveform¹
• Pangolier – Swashbuckle
• Phantom Assassin – Stifling Dagger
• Puck – Dream Coil¹
• Riki – Tricks of the Trade
• Shadow Shaman – Serpent Ward split shot^{2 4}
• Tiny – Tree Throw
• Tiny – Tree Volley
• Tidehunter – Anchor Smash
• Void Spirit – Astral Step
• Weaver – Geminate Attack

¹ Requires talent.

² Requires Aghanim's Scepter.

³ Grants instant attacks to tier 2, 3, and 4 towers.

⁴ These instant attacks may not proc any attack modifiers or on-hit effects.

⁵ Split Shot may not proc any attack modifiers or on-hit effects, unless the required talent is chosen.

⁶ Number of instant attacks is dependent on Juggernaut's attack speed.

Attack damage granting talents

The following heroes have a talent that grants them bonus attack damage.

Bonus	Level 10		Level 15		Level 20		Level 25
	Left	Right	Left	Right	Left	Right	Left	Right
Bonus attack damage	+35	+12 +15 +20 +25 +30 +30	+30 +35 +45 +45	+45 +80				+252

The following heroes have a talent that grants them base attack damage.

Bonus	Level 10		Level 15		Level 20		Level 25
	Left	Right	Left	Right	Left	Right	Left	Right
Base attack damage	+50	+30

Attack damage increasing items

Strength

Agility

Intelligence

Bonus attack damage

Attack damage increasing abilities

Percentage Bonus

• Gives a unit a damage buff equal to a percentage of their main attack damage.

• Earthshaker - Enchant Totem
  
  Attack Damage Bonus: 100%/200%/300%/400%
  Duration: 14
  Number of Attacks: 1
  
• Lycan - Feral Impulse
  
  Attack Damage Bonus: 10%/20%/30%/40% ( 35%/45%/55%/65%)
  Radius: 1200
  Affects units under Lycan's control only.
• Vladmir's Offering - Vladmir's Aura
  
  Attack Damage Bonus: 1
  Radius: 1200
  
• Magnus - Empower
  
  Attack Damage Bonus: 16%/24%/32%/40% ( 26%/34%/42%/50%)
  Duration: 40
  
• Sven - God's Strength
  
  Self Attack Damage Bonus: 80%/120%/160%
  Duration: 25
  
• Tiny - Tree Grab
  
  Attack Damage Bonus: 10%/20%/30%/40%
  Number of Attacks: 5
  
• Alpha Wolf - Packleader's Aura
  
  Attack Damage Bonus: 20%
  Radius: 1200
  
• Double Damage Rune - [[Double Damage Rune#|]]
  64px|text-top|link=Double Damage Rune#
  Attack Damage Bonus: 100%
  Duration: 45
  
• Illusions - [[Illusions#|]]
  64px|text-top|link=Illusions#
  Based on the ability the illusion is created by, it may deal more attack damage than the hero it is based on.

Flat bonus

• Armlet of Mordiggian - Unholy Strength
  
  Attack Damage Bonus: 31
  
• Bristleback - Warpath
  
  Max Stacks: 5/7/9
  Attack Damage Bonus per Stack: 18/24/30 ( 48/54/60)
  Stack Duration: 14
  
• Broodmother - Insatiable Hunger
  
  Attack Damage Bonus: 60/100/140 ( 120/160/200)
  Duration: 14
  
• Chen - Holy Persuasion
  
  Attack Damage Bonus: 8/16/24/32
  
• Elder Titan - Astral Spirit
  
  Attack Damage Bonus per Creep: 6/9/12/15
  Attack Damage Bonus per Hero: 15/30/60/80 ( 45/60/90/110)
  Duration: 10
  Elder Titan gains bonus attack damage after the Astral Spirit returns to him based on the amount of units it has hit.
• Enchantress - Enchant
  
  Attack Damage Bonus: 10/30/50/70
  Duration: 30/60/90/120
  
• Helm of the Dominator - Dominate
  
  Attack Damage Bonus: 25
  Damage is directly added to the unit's main attack damage.
• Invoker - Alacrity
  
  Attack Damage Bonus (Exort): 10/25/40/55/70/85/100 ( /115)
  Duration: 9
  
• Invoker - Exort
  
  Attack Damage Bonus per Exort Instance: 3/7/11/15/19/23/27
  Maximum of 3 Exort instances.
• Legion Commander - Duel
  
  Attack Damage Bonus: 10/18/26 ( 50/58/66)
  The winner of the duel gains a permanent attack damage bonus.
• Monkey King - Jingu Mastery
  
  Charges: 4
  Attack Damage Bonus: 60/90/120/150 ( 135/165/195/225)
  Grants Monkey King bonus attack damage for 4 attacks after having attacked the same enemy hero 4 times.
• Phantom Assassin - Stifling Dagger
  
  Attack Damage Bonus: 65
  Damage is granted as the projectile hits the target and immediately removed afterwards, so that only the dagger can use it.
• Razor - Static Link
  
  Attack Damage Stolen per Second: 7/14/21/28 ( 14/21/28/35)
  Link Duration: 8
  Buff Duration: 18
  
• Shadow Fiend - Necromastery
  
  Max Souls: 12/20/28/36 ( 22/30/38/46)
  Attack Damage Bonus per Soul: 2 ( 4)
  
• Templar Assassin - Refraction
  
  Number of Instances: 3/4/5/6 ( 7/8/9/10)
  Attack Damage Bonus: 20/40/60/80
  Duration: 17
  
• Terrorblade - Metamorphosis
  
  Attack Damage Bonus: 20/40/60/80
  Duration: 40/44/48/52
  Damage is directly added to the unit's main attack damage.
• Tiny - Grow
  
  Attack Damage Bonus: 30/45/60
  Damage is directly added to the unit's main attack damage.
• Underlord - Atrophy Aura
  
  Hero Death Attack Damage Bonus: 30/35/40/45
  Creep Death Attack Damage Bonus: 2/4/6/8
  Duration: 30/45/60/75 ( 70/80/90/100)
  Damage bonuses are independent from each other and fully stack.

Conditional bonus

These abilities give direct attack damage bonuses under certain circumstances. Due to this, they do not display their damage bonus in the HUD. Their damage type can also vary and is not necessarily physical; nonetheless, they still count as attack damage since their damage is dealt in one instance together with a unit's attack damage. This means they are affected by armor type (even when dealing magical damage), but not by spell damage amplification.

• Abyssal Blade - Bash
  
  Proc Chance (Melee): 25%
  Proc Chance (Ranged): 10%
  Damage: 100
  Damage applies to the proccing attack. Physical damage.
• Anti-Mage - Mana Break
  
  Mana Burned per Hit: 25/30/35/40
  Max Mana Burned per Hit: 50%
  Burned Mana as Damage: 1.6%/2.4%/3.2%/4%
  Damage applies upon attacking units which have mana.
• Battle Fury - Quell
  
  Melee Attack Damage Bonus: 18
  Ranged Attack Damage Bonus: 5
  Damage only applies against non-hero units.
• Diffusal Blade - Manabreak
  
  Mana Burned per Hit: 50
  Mana Burned per Hit (Melee Illusion): 16
  Mana Burned per Hit (Ranged Illusion): 8
  Burned Mana as Damage: 80%
  Damage applies upon attacking units which have mana.
• Drow Ranger - Marksmanship
  
  Proc Chance: 20%/30%/40%
  Proc Damage: 120/130/140
  Damage applies to the proccing attack. Physical damage.
• Earth - Demolish
  
  Building Attack Damage Bonus: 90/180/270
  Damage applies when attacking buildings.
• Ember Spirit - Sleight of Fist
  
  Attack Damage Bonus against Heroes: 40/80/120/160
  Only deals bonus damage to heroes.
• Enchanted Quiver - Certain Strike
  
  Damage: 250
  Cooldown: 4
  Damage applies whenever it is off cooldown, and only to ranged attacks. Magical damage.
• Javelin - Pierce
  
  Proc Chance: 25%
  Damage: 100
  Damage applies to the proccing attack. Magical damage.
• Kunkka - Tidebringer
  
  Attack Damage Bonus: 25/50/75/100
  Cooldown: 13/10/7/4
  Damage applies whenever it is off cooldown and on autocast, or upon manually using.
• The Leveller - Demolish
  
  Building Attack Damage Bonus: 25%
  Damage applies when attacking buildings.
• Medusa - Stone Gaze
  
  Attack Damage Amplification: 50%
  Damage applies upon attacking units which are petrified.
• Mirana - [[Mirana#|]]
  64px|text-top|link=Mirana#
  Mana Burned per Hit: 25
  Mana Burned per Hit (Illusion): 10
  Burned Mana as Damage: 80%
  Damage applies upon attacking units which have mana.
• Monkey King Bar - Pierce
  
  Proc Chance: 75%
  Damage: 100
  Damage applies to the proccing attack. Magical damage.
• Necronomicon Warrior - Mana Break
  
  Mana Burned per Hit: 30/40/50
  Burned Mana as Damage: 50%
  Damage applies upon attacking units which have mana.
• Quelling Blade - Quell
  
  Melee Attack Damage Bonus: 8
  Ranged Attack Damage Bonus: 4
  Damage only applies against non-hero units.
• Riki - Cloak and Dagger
  
  Agility as Backstab Damage: 140%/180%/220% ( 190%/230%/270%)
  Damage applies when attacking enemies from behind. Damage is based on Riki's agility.
• Roshan - Bash
  
  Proc Chance: 15%
  Damage: 50
  Damage applies to the proccing attack. Physical damage.
• Shadow Blade - Shadow Walk
  
  Damage: 175
  Damage applies to the first attack out of the invisibility.
• Silver Edge - Shadow Walk
  
  Damage: 175
  Damage applies to the first attack out of the invisibility.
• Skull Basher - Bash
  
  Proc Chance (Melee): 25%
  Proc Chance (Ranged): 10%
  Damage: 100
  Damage applies to the proccing attack. Physical damage.
• Slardar - Bash of the Deep
  
  Required Hits: 4
  Damage: 75/125/175/225
  Damage applies to the proccing attack.
• Sniper - Headshot
  
  Proc Chance: 40%
  Damage: 30/60/90/120
  Damage applies to the proccing attack.
• Spirit Bear - Demolish
  
  Building Attack Damage Bonus: 40%
  Damage applies when attacking buildings.
• Storm - Wind Walk
  
  Damage: 100/160/220
  Damage applies to the first attack out of the invisibility.
• Tiny - Tree Grab
  
  Building Attack Damage Bonus: 80%/120%/160%/200%
  Damage applies when attacking buildings.
• Ursa - [[Ursa#|]]
  64px|text-top|link=Ursa#
  Attack Damage Bonus per Stack: 7/14/21/28 ( 23/30/37/44)
  Damage applies to each attack and grows stronger with consecutive attacks on the same target.
• Weaver - [[Weaver#|]]
  64px|text-top|link=Weaver#
  Mana Burned per Hit: 20
  Mana Burned per Hit (Illusion): 10
  Burned Mana as Damage: 80%
  Damage applies upon attacking units which have mana.

Attack damage reducing abilities

Percentage reduction

• Main attack damage reduction applies to main attack (white damage) only.
• Overall attack damage reduction applies to both main attack damage (white) and bonus damage (green).
• All effects shown here reduce the affected unit's damage before any damage block is applied.

• Dragon Knight - Breathe Fire
  
  Overall Attack Damage Reduction: 25% ( 50%)
  
• Illusions - [[Illusions#|]]
  64px|text-top|link=Illusions#
  Based on the ability the illusion is created by, it may deal less attack damage than the hero it is based on.
• Lycan - Howl
  
  Main Attack Damage Reduction: 25%/30%/35%/40%
  
• Phantom Assassin - Stifling Dagger
  
  Overall Attack Damage Reduction: 75%/60%/45%/30%
  The reduction is applied as the projectile hits the target and immediately removed afterwards, so that only the dagger is affected by it.
• Rubick - Fade Bolt
  
  Main Attack Damage Reduction: 10%/18%/16%/34%
  
• Tidehunter - Anchor Smash
  
  Main Attack Damage Reduction: 30%/40%/50%/60%
  
• Underlord - Atrophy Aura
  
  Main Attack Damage Reduction: 5%/15%/25%/35%
  
• Windranger - Focus Fire
  
  Overall Attack Damage Reduction: 50%/40%/30%
  Reduces own attack damage when attacking the Focus Fire target.

Flat reduction

Flat damage reduction is applied before crits as negative bonus attack damage.

• Razor - Static Link
  
  Attack Damage Stolen per Second: 7/14/21/28 ( 21/28/35/42)
  Link Duration: 8
  

Conditional reduction

These abilities reduce attack damage under certain circumstances. Due to this, they do not display their reductions in the HUD.

• Drow Ranger - Marksmanship
  
  Splinter Attack Damage Reduction: 50%
  Reduces Drow Ranger's attack damage when the secondary projectiles hit.
• Ember Spirit - Sleight of Fist
  
  Attack Damage Reduction against Creeps: 50%
  Only reduces damage against creeps.
• Juggernaut - Blade Fury
  
  Attack Damage Reduction: 100%
  When attacking non-building units during Blade Fury, the attack damage gets reduced to 0.
• Medusa - Split Shot
  
  Attack Damage Reduction: 70%/55%/40%/25%
  Reduces Medusa's attack damage when the secondary projectiles hit.

See also

• Table of hero attributes

Mechanics Main Heroes Unit Type (Heroes / Clones / Illusions) Complexity Attributes Table Buyback Level Roles Gold Experience Animations Stats Armor Attributes ( Strength / Agility / Intelligence) / Universal) Health & Mana (HP Regen & MP Regen) Magic Resistance Movement Speed / Slow Resistance Status Resistance Turn Rate Misc Creep Controling Death / Denying Vision Unit Size (Collision Size / Bound Radius / Selection Box / Model Size) Gib Type / Shades Adjectives Buildings Towers / Barracks / Ancient / Fountain Effigy Neutral Buildings (Outposts / Watchers / Twin Gates / Lotus Pools) Abilities Type Active / Passive / Autocast Aura Accuracy / Evasion Channeling Damage Barrier Damage Block Damage Manipulation Damage Over Time Talents Teleport Targeting Area No Target Point Unit Vector Combinations Casting Cast Range / Motion Buffer Cast Animation (Cast Point + Backswing) Cooldown Reduction (Flat / Current Flat / Percentage) Reset Charge-based Runes Bounty Rune Water Rune Wisdom Rune Power Runes ( Amplify Damage Rune / Arcane Rune / Haste Rune / Illusion Rune / Invisibility Rune / Regeneration Rune / Shield Rune) Misc Random Distribution Transformation Attack Damage Attack Damage Instant Attack Heroes Attack Classes Attack Range (Acquisition Range) Attack Speed (BAT / Interval) Damage Types (Physical / Magical / Pure / Instant Kill) Flags (HP Removal / No-reflection / No-Spell-Lifesteal / No-Spell-Amplification) Projectile Speed Spell Damage (Outgoing / Incoming) Modifiers Bash Cleave / Splash Corruption Critical Strike Lifesteal / Spell Lifesteal Mana Break On-hit Effects Misc Damage Instance Animation / Orb Walking Status Effects Disables Cyclone Disabling Orders Forced Movement (Knockback) / Upward Movement Fear (Hypnosis) Hide Hex Root Leash Stun Sleep Taunt Movement Move Speed Slow Flying Movement Phased / Tree Walk / Unobstructed Movement Other Attack Immune / Non-targetable Attack Speed Slow Debuff Immunity Spell Immunity Invulnerability Invisibility Blind Break Disarm Ethereal Silence Mute Trap Dispels Basic Strong Death Items Mechanics Courier Sharing / Selling Disassemble Recipes Neutral Item Drop