Attack damage

Attack damage is the amount of damage a unit is dealing with an unmodified basic attack; the base values are different for every hero. The total attack damage of a unit is the sum of main attack damage and bonus damage. Attack damage is reduced by armor.

Final attack damage

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

Formula:

Damage =

{ [Main 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 never changes 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. The best example for this is Chaos Knight since his base damage varies between 29 and 59. The difference of 30 is always part of the total attack damage, no matter how many attributes or how much bonus damage is acquired.

Main attack damage

Main attack damage is the damage value shown in white numbers on a hero's statistics consisting of the base damage with the damage granted by a hero's primary attribute on top. The only way to improve a hero's main attack damage is to increase its primary attribute. Attribute points can be increased by acquiring levels, as well as specific skills and items. This also means that the value of items granting attribute points differs depending on whether it is equipped by a strength, agility or intelligence hero.

Formula:

main damage = base damage + primary attribute points.

Hero attack damage

Hero Base Attack Damage Starting Attack Damage Max Main Attack Damage Damage Range Minimum Damage Maximum Damage Minimum Damage Maximum Damage Minimum Damage Maximum Damage Abaddon 32 42 55 65 117 127 10 Alchemist 24 33 49 58 99 108 9 Ancient Apparition 21 31 44 54 106 116 10 Anti-Mage 29 33 51 55 118 122 4 Arc Warden 31 41 46 56 89 99 10 Axe 24 28 49 53 116 120 4 Bane 35 41 58 64 116 122 6 Batrider 16 20 38 42 98 102 4 Beastmaster 41 45 64 68 124 128 4 Bloodseeker 33 39 57 63 129 135 6 Bounty Hunter 24 38 45 59 110 124 14 Brewmaster 29 36 52 59 129 136 7 Bristleback 22 32 44 54 104 114 10 Broodmother 26 32 41 47 94 100 6 Centaur Warrunner 36 38 63 65 159 161 2 Chaos Knight 29 59 51 81 128 158 30 Chen 29 39 48 58 115 125 10 Clinkz 15 21 37 43 99 105 6 Clockwerk 24 26 50 52 127 129 2 Crystal Maiden 28 34 42 48 112 118 6 Dark Seer 33 39 54 60 119 125 6 Dark Willow 27 35 45 53 117 125 8 Dazzle 22 28 47 53 124 130 6 Death Prophet 26 38 47 59 119 131 12 Disruptor 29 33 49 53 109 113 4 Doom 27 43 53 69 137 153 16 Dragon Knight 31 37 50 56 124 130 6 Drow Ranger 25 36 48 59 101 112 11 Earth Spirit 25 35 46 56 137 147 10 Earthshaker 27 37 49 59 126 136 10 Elder Titan 23 33 47 57 109 119 10 Ember Spirit 30 34 52 56 95 99 4 Enchantress 30 40 47 57 121 131 10 Enigma 24 30 42 48 124 130 6 Faceless Void 33 39 56 62 123 129 6 Grimstroke 27 31 50 54 129 133 4 Gyrocopter 18 28 37 47 111 121 10 Huskar 19 24 40 45 105 110 5 Invoker 21 27 35 41 131 137 6 Io 22 31 39 48 92 101 9 Jakiro 27 35 53 61 120 128 8 Juggernaut 12 16 48 52 106 110 4 Keeper of the Light 20 27 43 50 110 117 7 Kunkka 26 36 50 60 129 139 10 Legion Commander 35 39 61 65 131 135 4 Leshrac 19 23 41 45 113 117 4 Lich 26 35 46 55 132 141 9 Lifestealer 27 37 52 62 126 136 10 Lina 18 30 46 58 123 135 12 Lion 29 35 47 53 119 125 6 Lone Druid 18 22 38 42 96 100 4 Luna 20 26 38 44 112 118 6 Lycan 30 35 55 60 134 139 5 Magnus 32 44 55 67 132 144 12 Medusa 24 30 46 52 128 134 6 Meepo 20 26 43 49 77 83 6 Mirana 25 30 43 48 120 125 5 Monkey King 29 35 51 57 128 134 6 Morphling 9 18 33 42 122 131 9 Naga Siren 23 25 44 46 121 123 2 Nature's Prophet 29 43 52 66 122 136 14 Necrophos 26 30 46 50 106 110 4 Night Stalker 38 42 61 65 135 139 4 Nyx Assassin 27 31 46 50 99 103 4 Ogre Magi 43 49 58 64 106 112 6 Omniknight 31 41 53 63 127 137 10 Oracle 18 24 39 45 123 129 6 Outworld Devourer 16 31 44 59 116 131 15 Pangolier 29 35 47 53 114 120 6 Phantom Assassin 23 25 46 48 123 125 2 Phantom Lancer 22 44 51 73 113 135 22 Phoenix 26 36 45 55 122 132 10 Puck 30 41 53 64 118 129 11 Pudge 34 40 59 65 143 149 6 Pugna 19 27 43 51 151 159 8 Queen of Pain 23 31 45 53 105 113 8 Razor 23 25 45 47 88 90 2 Riki 14 18 44 48 97 101 4 Rubick 22 32 47 57 112 122 10 Sand King 23 33 45 55 112 122 10 Shadow Demon 29 33 50 54 115 119 4 Shadow Fiend 15 21 35 41 105 111 6 Shadow Shaman 52 59 73 80 145 152 7 Silencer 18 32 43 57 103 117 14 Skywrath Mage 14 24 39 49 125 135 10 Slardar 30 38 51 59 125 133 8 Slark 33 41 54 62 90 98 8 Sniper 15 21 36 42 101 107 6 Spectre 23 27 46 50 89 93 4 Spirit Breaker 31 41 60 70 125 135 10 Storm Spirit 26 36 48 58 125 135 10 Sven 43 45 66 68 138 140 2 Techies 9 11 31 33 101 103 2 Templar Assassin 30 36 53 59 108 114 6 Terrorblade 26 32 48 54 149 155 6 Tidehunter 25 31 47 53 126 132 6 Timbersaw 26 30 47 51 105 109 4 Tinker 24 30 52 58 105 111 6 Tiny 44 50 74 80 160 166 6 Treant Protector 62 70 87 95 173 181 8 Troll Warlord 23 35 44 56 104 116 12 Tusk 27 31 50 54 132 136 4 Underlord 37 43 62 68 132 138 6 Undying 35 43 57 65 115 123 8 Ursa 24 28 42 46 92 96 4 Vengeful Spirit 12 20 39 47 118 126 8 Venomancer 16 18 42 44 109 111 2 Viper 23 25 44 46 114 116 2 Visage 23 33 45 55 105 115 10 Warlock 24 34 46 56 111 121 10 Weaver 36 46 50 60 124 134 10 Windranger 24 36 42 54 104 116 12 Winter Wyvern 12 19 38 45 112 119 7 Witch Doctor 29 39 51 61 121 131 10 Wraith King 39 41 61 63 128 130 2 Zeus 33 41 53 61 118 126 8

Percentage bonus damage

Bonus damage from percentage sources such as Vladmir's Offering, Vengeance Aura, and Packleader's Aura add an amount of bonus damage based on the affected unit's main attack damage, but do not multiply the raw bonus damage from other abilities or items.

Flat bonus damage

Bonus damage is the damage value shown in green numbers on a unit's statistics. Whenever an item or skill shows a +damage value, it increases the bonus damage of the affected unit.

For example Power Treads give +12 bonus damage. Static Link adds negative bonus damage which is equal to a reduction.

Formula

bonus damage = sum of bonuses + sum of reductions.

Critical strike multiplier

The highest critical strike increases main and bonus damage by a certain factor.

Main Article: Critical Strike

Blocked damage

Damage Block is a passive ability that gives the wielding unit a chance to block some physical damage from an attack. Only one source of damage block can trigger per attack.

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 value multiplier = 1 - × armor ÷ (1 + × |armor|).

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 couple of abilities like Bristleback, Stampede and Penitence modify all incoming damage, including physical attack damage.

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		85%	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 Return, 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:

• Drow Ranger – Marksmanship¹
• Ember Spirit – Sleight of Fist
• Faceless Void – Time Lock
• Gyrocopter – Flak Cannon²
• Gyrocopter – Side Gunner¹
• Io – Tether³
• Juggernaut – Omnislash⁵
• Legion Commander – Moment of Courage
• Medusa – Split Shot⁴
• Monkey King – Boundless Strike
• Morphling – Waveform³
• Pangolier – Swashbuckle
• Phantom Assassin – Stifling Dagger
• Puck – Dream Coil³
• Riki – Tricks of the Trade
• Shadow Shaman – Serpent Ward split shot^{1 2}
• Sniper – Assassinate¹
• Tiny – Tree Throw
• Tidehunter – Anchor Smash
• Weaver – Geminate Attack

¹ Requires Aghanim's Scepter.

² These instant attacks may not proc any attack modifiers or on-hit effects.

³ Requires talent.

⁴ Split Shot may not proc any attack modifiers or on-hit effects, unless the required talent is chosen.

⁵ Number of instant attacks is dependent on Juggernauts attack speed.

Attack damage increasing items

Strength

Attack damage increase for strength heroes

Item	Value	Item cost	Cost per value point
Abyssal Blade	35	6650	190
Aghanim's Scepter	10	4200	420
Armlet of Mordiggian	65	2380	36.62
Belt of Strength	6	450	75
Black King Bar	34	4050	119.12
Bracer	6	515	85.83
Buckler	2	800	400
Circlet	2	165	82.5
Crimson Guard	2	3550	1775
Crown	4	450	112.5
Dagon 1	5	2700	540
Dagon 2	5	3950	790
Dagon 3	5	5200	1040
Dagon 4	5	6450	1290
Dagon 5	5	7700	1540
Dragon Lance	12	1900	158.33
Drum of Endurance	6	1525	254.17
Echo Sabre	24	2650	110.42
Ethereal Blade	10	4700	470
Eye of Skadi	25	5500	220
Gauntlets of Strength	3	135	45
Ghost Scepter	5	1500	300
Guardian Greaves	5	5375	1075
Headdress	2	525	262.5
Heart of Tarrasque	45	5200	115.56
Heaven's Halberd	45	3500	77.78
Helm of the Dominator	2	1875	937.5
Hurricane Pike	15	4600	306.67
Iron Branch	1	50	50
Kaya and Sange	28	4100	146.43
Linken's Sphere	13	5050	388.46
Magic Wand	3	450	150
Manta Style	10	4700	470
Mekansm	5	2275	455
Meteor Hammer	12	2625	218.75
Necronomicon 1	10	2400	240
Necronomicon 2	15	3700	246.67
Necronomicon 3	20	5000	250
Null Talisman	3	515	171.67
Ogre Axe	10	1000	100
Pipe of Insight	2	3025	1512.5
Power Treads (Strength)	30	1380	46
Reaver	25	3000	120
Rod of Atos	12	2750	229.17
Sange	24	2050	85.42
Sange and Yasha	28	4100	146.43
Satanic	50	5300	106
Scythe of Vyse	10	5700	570
Silver Edge	45	5550	123.33
Skull Basher	35	2950	84.29
Solar Crest	10	3875	387.5
Soul Ring	6	770	128.33
Spirit Vessel	2	2975	1487.5
Ultimate Orb	10	2150	215
Urn of Shadows	2	875	437.5
Veil of Discord	6	2050	341.67
Vladmir's Offering	2	1925	962.5
Wraith Band	3	515	171.67
Values may include portions from actives or auras.

Agility

Attack damage increase for agility heroes

Item	Value	Item cost	Cost per value point
Aghanim's Scepter	10	4200	420
Band of Elvenskin	6	450	75
Blade of Alacrity	10	1000	100
Bracer	3	515	171.67
Buckler	2	800	400
Butterfly	60	5475	91.25
Circlet	2	165	82.5
Crimson Guard	2	3550	1775
Crown	4	450	112.5
Dagon 1	5	2700	540
Dagon 2	5	3950	790
Dagon 3	5	5200	1040
Dagon 4	5	6450	1290
Dagon 5	5	7700	1540
Diffusal Blade	20	3150	157.5
Dragon Lance	12	1900	158.33
Drum of Endurance	6	1525	254.17
Eaglesong	25	3200	128
Ethereal Blade	40	4700	117.5
Eye of Skadi	25	5500	220
Ghost Scepter	5	1500	300
Guardian Greaves	5	5375	1075
Headdress	2	525	262.5
Helm of the Dominator	2	1875	937.5
Hurricane Pike	20	4600	230
Iron Branch	1	50	50
Linken's Sphere	13	5050	388.46
Magic Wand	3	450	150
Manta Style	26	4700	180.77
Mekansm	5	2275	455
Null Talisman	3	515	171.67
Pipe of Insight	2	3025	1512.5
Power Treads (Agility)	30	1380	46
Rod of Atos	12	2750	229.17
Sange and Yasha	28	4100	146.43
Scythe of Vyse	10	5700	570
Silver Edge	45	5550	123.33
Slippers of Agility	3	135	45
Solar Crest	10	3875	387.5
Spirit Vessel	2	2975	1487.5
Ultimate Orb	10	2150	215
Urn of Shadows	2	875	437.5
Veil of Discord	6	2050	341.67
Vladmir's Offering	2	1925	962.5
Wraith Band	6	515	85.83
Yasha	16	2050	128.13
Yasha and Kaya	16	4100	256.25
Values may include portions from actives or auras.

Intelligence

Attack damage increase for intelligence heroes

Item	Value	Item cost	Cost per value point
Aghanim's Scepter	10	4200	420
Blade Mail	32	2200	68.75
Bloodthorn	93	7205	77.47
Bracer	3	515	171.67
Buckler	2	800	400
Circlet	2	165	82.5
Crimson Guard	2	3550	1775
Crown	4	450	112.5
Dagon 1	18	2700	150
Dagon 2	21	3950	188.1
Dagon 3	24	5200	216.67
Dagon 4	27	6450	238.89
Dagon 5	30	7700	256.67
Diffusal Blade	10	3150	315
Drum of Endurance	6	1525	254.17
Echo Sabre	22	2650	120.45
Ethereal Blade	10	4700	470
Eul's Scepter of Divinity	10	2750	275
Eye of Skadi	25	5500	220
Force Staff	10	2250	225
Ghost Scepter	5	1500	300
Guardian Greaves	5	5375	1075
Headdress	2	525	262.5
Helm of the Dominator	2	1875	937.5
Hurricane Pike	13	4600	353.85
Iron Branch	1	50	50
Kaya	16	2050	128.13
Kaya and Sange	28	4100	146.43
Linken's Sphere	13	5050	388.46
Magic Wand	3	450	150
Manta Style	10	4700	470
Mantle of Intelligence	3	135	45
Mekansm	5	2275	455
Meteor Hammer	12	2625	218.75
Mystic Staff	25	2700	108
Null Talisman	6	515	85.83
Oblivion Staff	20	1650	82.5
Octarine Core	25	5900	236
Orchid Malevolence	55	4075	74.09
Pipe of Insight	2	3025	1512.5
Power Treads (Intelligence)	30	1380	46
Robe of the Magi	6	450	75
Rod of Atos	20	2750	137.5
Scythe of Vyse	35	5700	162.86
Shiva's Guard	30	4750	158.33
Silver Edge	45	5550	123.33
Solar Crest	10	3875	387.5
Spirit Vessel	2	2975	1487.5
Staff of Wizardry	10	1000	100
Ultimate Orb	10	2150	215
Urn of Shadows	2	875	437.5
Veil of Discord	15	2050	136.67
Vladmir's Offering	2	1925	962.5
Wraith Band	3	515	171.67
Yasha and Kaya	16	4100	256.25
Values may include portions from actives or auras.

Bonus damage

Attack damage increase independent from primary attribute

Item	Value	Item cost	Cost per value point
Abyssal Blade	25	6650	266
Armlet of Mordiggian	40	2380	59.5
Battle Fury	45	4400	97.78
Black King Bar	24	4050	168.75
Blade Mail	22	2200	100
Blades of Attack	9	430	47.78
Bloodthorn	68	7205	105.96
Broadsword	18	1200	66.67
Butterfly	25	5475	219
Claymore	21	1400	66.67
Crystalys	38	2130	56.05
Daedalus	80	5330	66.63
Demon Edge	42	2200	52.38
Desolator	50	3500	70
Divine Rapier	330	6000	18.18
Echo Sabre	12	2650	220.83
Faerie Fire	2	70	35
Heaven's Halberd	25	3500	140
Kaya and Sange	12	4100	341.67
Maelstrom	24	2700	112.5
Mask of Madness	10	1775	177.5
Mithril Hammer	24	1600	66.67
Mjollnir	24	5600	233.33
Monkey King Bar	52	4175	80.29
Nullifier	65	4700	72.31
Oblivion Staff	10	1650	165
Orchid Malevolence	30	4075	135.83
Power Treads (Agility)	16	1380	86.25
Power Treads (Intelligence)	16	1380	86.25
Power Treads (Strength)	16	1380	86.25
Quarterstaff	10	875	87.5
Radiance	65	5150	79.23
Ring of Basilius	7	500	71.43
Sacred Relic	60	3800	63.33
Sange	8	2050	256.25
Sange and Yasha	12	4100	341.67
Satanic	25	5300	212
Shadow Blade	22	2800	127.27
Silver Edge	30	5550	185
Skull Basher	25	2950	118
Values may include portions from actives or auras.

Attack damage increasing abilities

Percentage bonus

• Earthshaker - Enchant Totem
  
  Attack Damage Bonus: 100%/200%/300%/400%
  Duration: 14
  Number of Attacks: 1
  
• Lycan - Feral Impulse
  
  Attack Damage Bonus: 12%/24%/36%/48% ( 28%/40%/52%/64%)
  Radius: 900
  Affects units under Lycan's control only.
• Magnus - Empower
  
  Attack Damage Bonus: 14%/34%/54%/74% ( 34%/54%/74%/94%)
  Duration: 40
  
• Sven - God's Strength
  
  Self Attack Damage Bonus: 80%/120%/160%
  Allies Attack Damage Bonus: 0 ( 75%/100%/125%)
  Duration: 25
  The Aghanim's Scepter upgrade grants allies a damage bonus in a 900 radius around Sven.
• Vengeful Spirit - Vengeance Aura
  
  Attack Damage Bonus: 12%/18%/24%/30% ( 27%/33%/39%/45%)
  Radius: 900
  
• Alpha Wolf - Packleader's Aura
  
  Attack Damage Bonus: 30%
  Radius: 900
  
• Ancient Thunderhide - War Drums Aura
  
  Attack Damage Bonus: 15%
  Radius: 900
  
• Double Damage Rune - Double Damage
  
  Attack Damage Bonus: 100%
  Duration: 45
  
• Vladmir's Offering - Vladmir's Aura
  
  Attack Damage Bonus: 15%
  Radius: 900
  
• Illusions - Illusion
  
  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
  
• Bloodseeker - Thirst
  
  Max Attack Damage Bonus per Hero: 16/24/32/40
  The damage bonus scales based on the percentage of enemy heroes' missing health.
• Bristleback - Warpath
  
  Max Stacks: 5/7/9
  Attack Damage Bonus per Stack: 18/24/30
  Stack Duration: 14
  
• Broodmother - Insatiable Hunger
  
  Attack Damage Bonus: 60/100/140
  Duration: 14
  
• Clinkz - Death Pact
  
  Target's Max Health as Attack Damage Bonus: 5%/7%/9%
  Duration: 65
  Damage is directly added to the unit's main damage.
• Drow Ranger - Precision Aura
  
  Agility as Ranged Attack Damage Bonus: 10%/20%/30%/40% ( 30%/40%/50%/60%)
  Radius: Global
  
• Elder Titan - Astral Spirit
  
  Attack Damage Bonus per Creep: 6/9/12/15
  Attack Damage Bonus per Hero: 12/24/36/48 ( 92/104/116/128)
  Duration: 9
  Elder Titan gains bonus damage after the Astral Spirit returns to him based on the amount of units it has hit.
• Invoker - Alacrity
  
  Attack Damage Bonus (Exort): 10/25/40/55/70/85/100 ( /115)
  Duration: 9
  
• Invoker - Exort
  
  Attack Damage Bonus per Exort Instance: 4/8/12/16/20/24/28
  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.
• Lone Druid - Battle Cry
  
  Attack Damage Bonus: 70/100/130
  Duration: 6
  
• Luna - Lunar Blessing
  
  Attack Damage Bonus: 14/22/30/38
  Radius: 900
  
• Lycan - Howl
  
  Hero Attack Damage Bonus: 10/15/20/25
  Non-Hero Attack Damage Bonus: 4/6/8/10
  Duration: 13
  Values double during the night.
• Monkey King - Jingu Mastery
  
  Charges: 4
  Attack Damage Bonus: 75/100/125/150 ( 150/175/200/225)
  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 ( 21/28/35/42)
  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 ( 6/7/8/9)
  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 damage.
• Tiny - Grow
  
  Attack Damage Bonus: 30/45/60
  Damage is directly added to the unit's main damage.
• Underlord - Atrophy Aura
  
  Hero Death Attack Damage Bonus: 30/35/40/45
  Creep Death Attack Damage Bonus: 5
  Duration: 30/40/50/60
  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 bonus damage 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. Magical damage.
• Anti-Mage - Mana Break
  
  Mana Burned per Hit: 28/40/52/64
  Burned Mana as Damage: 50%
  Damage applies upon attacking units which have mana.
• Battle Fury - Quell
  
  Melee Attack Damage Bonus: 60%
  Ranged Attack Damage Bonus: 25%
  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.
• Earth - Demolish
  
  Building Attack Damage Bonus: 90/180/270
  Damage applies when attacking buildings.
• Faceless Void - Time Lock
  
  Proc Chance: 10%/15%/20%/25%
  Damage: 50/75/100/125
  Damage applies to the proccing attack. 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.
• Lifestealer - Feast
  
  Enemy Current Health as Attack Damage Bonus: 4.5%/5.5%/6.5%/7.5%
  Damage depends on target's current health.
• Medusa - Stone Gaze
  
  Attack Damage Amplification: 50%
  Damage applies upon attacking units which are petrified.
• Mirana - Mana Break
  
  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: 20/30/40
  Burned Mana as Damage: 60%
  Damage applies upon attacking units which have mana.
• Quelling Blade - Quell
  
  Melee Attack Damage Bonus: 24
  Ranged Attack Damage Bonus: 7
  Damage only applies against non-hero units.
• Riki - Cloak and Dagger
  
  Agility as Backstab Damage: 50%/75%/100%/125% ( 90%/115%/140%/165%)
  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. Magical damage.
• Slardar - Bash of the Deep
  
  Proc Chance: 10%/15%/20%/25%
  Damage: 60/80/100/120
  Damage applies to the proccing attack.
• Sniper - Headshot
  
  Proc Chance: 40%
  Damage: 20/50/80/110
  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 - Grow
  
  Building Attack Damage Bonus: 0% ( 75%)
  Damage applies when attacking buildings.
• Troll Warlord - Berserker's Rage
  
  Proc Chance: 10%
  Damage: 20/30/40/50
  Damage applies to the proccing attack. Magical damage.
• Ursa - Fury Swipes
  
  Attack Damage Bonus per Stack: 15/20/25/30 ( 31/36/41/46)
  Damage applies to each attack and grows stronger with consecutive attacks on the same target.
• Weaver - Mana Break
  
  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 is always applied before damage block. Total attack damage reduction is inconsistent and noted separately.

• Dragon Knight - Breathe Fire
  
  Attack Damage Reduction: 25% ( 45%)
  The damage reduction is applied before the damage block.
• Illusions - Illusion
  
  The damage reduction is applied before the damage block. The value is based on the ability the illusion is created by, it may deal less attack damage than the hero it is based on.
• Phantom Assassin - Stifling Dagger
  
  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.
• Shadow Fiend - Requiem of Souls
  
  Main Attack Damage Reduction: 50%
  
• Tidehunter - Anchor Smash
  
  Main Attack Damage Reduction: 45%/50%/55%/60%
  
• Underlord - Atrophy Aura
  
  Main Attack Damage Reduction: 7%/18%/29%/40%
  
• Windranger - Focus Fire
  
  Attack Damage Reduction: 50%/40%/30% ( 30%/15%/0%)
  The damage reduction is applied before the damage block. Reduces own attack damage when attacking the target.

Flat reduction

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

• Bane - Enfeeble
  
  Attack Damage Reduction: 30/60/90/120 ( 150/180/210/240)
  
• Razor - Static Link
  
  Attack Damage Stolen per Second: 7/14/21/28 ( 21/28/35/42)
  Link Duration: 8
  
• Rubick - Fade Bolt
  
  Hero Attack Damage Reduction: 20/25/30/35 ( 65/70/75/80)
  Creep Attack Damage Reduction: 10/13/15/17
  

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.
• 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 Stats Armor Attributes (Strength / Agility / Intelligence) Collision size Health (Health regeneration) Magic resistance Mana (Mana regeneration) Movement speed Status resistance Turn rate Vision Attack Attack animation Attack damage Attack modifier (Bash / Cleave & Splash / Critical strike / Lifesteal / Mana break) Attack range Attack speed Cast animation Cast range Damage types Motion buffer range Projectile speed Spell damage Spell lifesteal Abilities Abilities Aura Channeling Damage block Damage manipulation Damage over time Evasion Talents Teleport Status effects Attack immunity Break Cyclone Disable Disarm Ethereal Fear Forced movement Hex Hide Hypnosis Invisibility Invulnerability Leash Root Silence Sleep Slow Spell immunity Stun Taunt World Experience Gold Glyph of Fortification Map (Minimap) River Scan Runes Time of day Trees Gameplay Creep control techniques Denying Disjoint Dispel Ganking Harassment Hero complexity Initiating Item passive stacking Item sharing Jungling Lane Pushing Random distribution Roles Trap Units Ancient creeps Buildings Couriers Creep-heroes Heroes Illusions Lane creeps Neutral creeps Roshan Summons & Wards