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:

final attack damage =

{ [main damage × (1 + Σ percentage bonus damage) + flat bonus damage]

× critical strike multiplier - blocked damage }

× armor value multiplier × armor type multiplier

× 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 19 29 44 54 106 116 10 Anti-Mage 27 31 49 53 116 120 4 Arc Warden 29 39 44 54 87 97 10 Axe 24 28 49 53 116 120 4 Bane 37 43 59 65 117 123 6 Batrider 14 18 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 59 117 131 14 Brewmaster 29 36 52 59 129 136 7 Bristleback 22 32 44 54 97 107 10 Broodmother 26 32 44 50 97 103 6 Centaur Warrunner 32 34 55 57 158 160 2 Chaos Knight 29 59 51 81 128 158 30 Chen 22 32 43 53 110 120 10 Clinkz 15 21 37 43 116 122 6 Clockwerk 28 30 54 56 131 133 2 Crystal Maiden 19 25 35 41 105 111 6 Dark Seer 31 37 54 60 119 125 6 Dazzle 14 32 41 59 123 141 18 Death Prophet 24 36 47 59 119 131 12 Disruptor 27 31 49 53 109 113 4 Doom 27 43 53 69 137 153 16 Dragon Knight 31 37 50 56 124 130 6 Drow Ranger 14 25 40 51 86 97 11 Earth Spirit 25 35 46 56 123 133 10 Earthshaker 24 34 46 56 123 133 10 Elder Titan 23 33 47 57 109 119 10 Ember Spirit 30 34 52 56 95 99 4 Enchantress 31 41 52 62 126 136 10 Enigma 22 28 42 48 124 130 6 Faceless Void 33 39 56 62 123 129 6 Gyrocopter 13 23 37 47 104 114 10 Huskar 21 30 42 51 107 116 9 Invoker 19 25 35 41 131 137 6 Io 26 35 43 52 96 105 9 Jakiro 25 33 53 61 120 128 8 Juggernaut 22 26 48 52 106 110 4 Keeper of the Light 18 25 43 50 110 117 7 Kunkka 26 36 50 60 129 139 10 Legion Commander 35 39 61 65 131 135 4 Leshrac 15 19 41 45 113 117 4 Lich 24 33 42 51 120 129 9 Lifestealer 27 37 52 62 126 136 10 Lina 13 31 40 58 117 135 18 Lion 27 33 47 53 119 125 6 Lone Druid 18 22 42 46 107 111 4 Luna 20 26 38 44 117 123 6 Lycan 36 41 61 66 140 145 5 Magnus 32 44 53 65 130 142 12 Medusa 24 30 44 50 104 110 6 Meepo 20 26 43 49 96 102 6 Mirana 21 32 41 52 127 138 11 Monkey King 30 36 52 58 129 135 6 Morphling 9 18 33 42 122 131 9 Naga Siren 23 25 44 46 110 112 2 Nature's Prophet 30 44 55 69 125 139 14 Necrophos 22 26 44 48 104 108 4 Night Stalker 38 42 61 65 135 139 4 Nyx Assassin 30 34 49 53 102 106 4 Ogre Magi 41 47 58 64 106 112 6 Omniknight 31 41 53 63 127 137 10 Oracle 16 22 39 45 109 115 6 Outworld Devourer 14 29 40 55 105 120 15 Phantom Assassin 23 25 46 48 122 124 2 Phantom Lancer 22 44 51 73 118 140 22 Phoenix 26 36 45 55 122 132 10 Puck 28 39 53 64 111 122 11 Pudge 27 33 52 58 136 142 6 Pugna 19 27 45 53 153 161 8 Queen of Pain 21 29 45 53 105 113 8 Razor 23 25 45 47 88 90 2 Riki 4 8 38 42 91 95 4 Rubick 17 27 44 54 102 112 10 Sand King 25 41 47 63 117 133 16 Shadow Demon 27 31 50 54 115 119 4 Shadow Fiend 15 21 35 41 105 111 6 Shadow Shaman 50 57 71 78 143 150 7 Silencer 16 30 43 57 103 117 14 Skywrath Mage 12 22 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 22 32 46 56 118 128 10 Sven 41 43 64 66 136 138 2 Techies 7 9 29 31 99 101 2 Templar Assassin 30 36 53 59 108 114 6 Terrorblade 26 32 48 54 125 131 6 Tidehunter 25 31 47 53 126 132 6 Timbersaw 26 30 47 51 97 101 4 Tinker 22 28 52 58 105 111 6 Tiny 44 50 70 76 149 155 6 Treant Protector 62 70 87 95 173 181 8 Troll Warlord 17 35 38 56 98 116 18 Tusk 27 31 50 54 112 116 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 26 39 53 118 132 14 Venomancer 19 21 41 43 108 110 2 Viper 23 25 44 46 114 116 2 Visage 21 31 45 55 105 115 10 Warlock 22 32 46 56 111 121 10 Weaver 36 46 50 60 117 127 10 Windranger 22 34 44 56 106 118 12 Winter Wyvern 13 20 38 45 112 119 7 Witch Doctor 27 37 51 61 121 131 10 Wraith King 39 41 61 63 138 140 2 Zeus 21 29 43 51 108 116 8

Percentage bonus damage

Bonus damage from percentage sources such as Vladmir's Offering, Vengeance Aura and God's Strength

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 Phase Boots give +24 bonus damage. Enfeeble 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 - 0.06 × armor ÷ (1 + 0.06 × |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 * 0.769 * 0.5) = 38.45 damage. The same attack would deal 76.9 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, Centaur Conqueror, Dark Troll Summoner, Hellbear, Hellbear Smasher, Wildwing Ripper, Satyr Tormenter, Ancient Granite Golem, Ancient Black Dragon, Ancient Thunderhide, Death Ward, Forged Spirit, Spiderling, Roshan, Warlock's Golem, Primal Split spirits, Familiar	100%	100%	50%
Basic	Melee lane creeps, Kobold, Kobold Soldier, Kobold Foreman, Centaur Courser, Fell Spirit, Mud Golem, Shard Golem, Ogre Bruiser, Ogre Frostmage, Alpha Wolf, Wildwing, Satyr Mindstealer, Ancient Rock Golem, Ancient Rumblehide, Eidolon, Treant, Greater Treant, Spiderite, Skeleton Warrior, Lycan Wolf, Spirit Bear	75%	100%	70%
Pierce	Ranged lane creeps, Giant Wolf, Vhoul Assassin, Ghost, Hill Troll, Satyr Banisher, Hill Troll Berserker, Hill Troll Priest, Harpy Scout, Harpy Stormcrafter, Ancient Black Drake, Necronomicon Archer, Necronomicon Warrior, Serpent Ward, Plague Ward, Boar, Undying Zombies	50%	150%	35%
Siege	Towers, Fountains, siege creeps	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 – Marksmanship (Aghanim's Scepter)
• Ember Spirit – Sleight of Fist
• Gyrocopter – Flak Cannon¹
• Gyrocopter – Side Gunner
• Legion Commander – Moment of Courage
• Medusa – Split Shot¹
• Monkey King – Boundless Strike
• Phantom Assassin – Stifling Dagger
• Riki – Tricks of the Trade
• Shadow Shaman – Serpent Ward split shot (Aghanim's Scepter)¹
• Sniper – Assassinate (Aghanim's Scepter)
• Weaver – Geminate Attack

¹ These instant attacks may not proc any attack modifiers or on-hit effects.

Attack damage increasing items

Strength

Attack damage increase for strength heroes

Item	Value	Item cost	Cost per value point
Abyssal Blade	20	6400	320
Aghanim's Scepter	10	4200	420
Armlet of Mordiggian	65	2370	36.46
Belt of Strength	6	450	75
Black King Bar	34	3975	116.91
Bracer	9	490	54.44
Buckler	2	800	400
Circlet	2	165	82.5
Crimson Guard	2	3550	1775
Dagon 1	12	2720	226.67
Dagon 2	12	3970	330.83
Dagon 3	12	5220	435
Dagon 4	12	6470	539.17
Dagon 5	12	7720	643.33
Dragon Lance	12	1900	158.33
Drum of Endurance	9	1640	182.22
Echo Sabre	25	2650	106
Ethereal Blade	10	4700	470
Eye of Skadi	25	5775	231
Gauntlets of Strength	3	150	50
Ghost Scepter	5	1500	300
Guardian Greaves	5	5375	1075
Headdress	2	675	337.5
Heart of Tarrasque	40	5200	130
Heaven's Halberd	45	3400	75.56
Helm of the Dominator	2	2025	1012.5
Hurricane Pike	15	4650	310
Iron Branch	1	50	50
Linken's Sphere	30	4850	161.67
Magic Wand	4	465	116.25
Manta Style	10	5000	500
Mekansm	5	2375	475
Necronomicon 1	8	2650	331.25
Necronomicon 2	12	3850	320.83
Necronomicon 3	16	5050	315.63
Null Talisman	6	470	78.33
Ogre Club	10	1000	100
Power Treads (Strength)	10	1350	135
Reaver	25	3000	120
Ring of Aquila	13	985	75.77
Rod of Atos	21	3080	146.67
Sange	26	1950	75
Sange and Yasha	32	3900	121.88
Satanic	75	5700	76
Scythe of Vyse	10	5700	570
Silver Edge	45	5550	123.33
Skull Basher	20	2700	135
Ultimate Orb	10	2150	215
Urn of Shadows	2	875	437.5
Veil of Discord	12	2340	195
Vladmir's Offering	2	2275	1137.5
Wraith Band	6	485	80.83
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	6	490	81.67
Buckler	2	800	400
Butterfly	65	5525	85
Circlet	2	165	82.5
Crimson Guard	2	3550	1775
Dagon 1	12	2720	226.67
Dagon 2	12	3970	330.83
Dagon 3	12	5220	435
Dagon 4	12	6470	539.17
Dagon 5	12	7720	643.33
Diffusal Blade 1	25	3150	126
Diffusal Blade 2	35	3850	110
Dragon Lance	12	1900	158.33
Drum of Endurance	6	1640	273.33
Eaglesong	25	3200	128
Ethereal Blade	40	4700	117.5
Eye of Skadi	25	5775	231
Ghost Scepter	5	1500	300
Guardian Greaves	5	5375	1075
Headdress	2	675	337.5
Helm of the Dominator	2	2025	1012.5
Hurricane Pike	20	4650	232.5
Iron Branch	1	50	50
Linken's Sphere	30	4850	161.67
Magic Wand	4	465	116.25
Manta Style	26	5000	192.31
Mekansm	5	2375	475
Null Talisman	6	470	78.33
Poor Man's Shield	6	500	83.33
Power Treads (Agility)	10	1350	135
Ring of Aquila	19	985	51.84
Rod of Atos	12	3080	256.67
Sange and Yasha	32	3900	121.88
Scythe of Vyse	10	5700	570
Silver Edge	45	5550	123.33
Slippers of Agility	3	150	50
Ultimate Orb	10	2150	215
Urn of Shadows	2	875	437.5
Veil of Discord	12	2340	195
Vladmir's Offering	2	2275	1137.5
Wraith Band	9	485	53.89
Yasha	16	1950	121.88
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	85	7195	84.65
Bracer	6	490	81.67
Buckler	2	800	400
Circlet	2	165	82.5
Crimson Guard	2	3550	1775
Dagon 1	25	2720	108.8
Dagon 2	28	3970	141.79
Dagon 3	31	5220	168.39
Dagon 4	34	6470	190.29
Dagon 5	37	7720	208.65
Diffusal Blade 1	10	3150	315
Diffusal Blade 2	15	3850	256.67
Drum of Endurance	9	1640	182.22
Echo Sabre	25	2650	106
Ethereal Blade	10	4700	470
Eul's Scepter of Divinity	10	2750	275
Eye of Skadi	25	5775	231
Force Staff	10	2250	225
Ghost Scepter	5	1500	300
Guardian Greaves	5	5375	1075
Headdress	2	675	337.5
Helm of the Dominator	2	2025	1012.5
Hurricane Pike	10	4650	465
Iron Branch	1	50	50
Linken's Sphere	30	4850	161.67
Magic Wand	4	465	116.25
Manta Style	10	5000	500
Mantle of Intelligence	3	150	50
Mekansm	5	2375	475
Mystic Staff	25	2700	108
Necronomicon 1	15	2650	176.67
Necronomicon 2	21	3850	183.33
Necronomicon 3	24	5050	210.42
Null Talisman	9	470	52.22
Oblivion Staff	20	1650	82.5
Octarine Core	25	5900	236
Orchid Malevolence	55	4075	74.09
Power Treads (Intelligence)	10	1350	135
Ring of Aquila	13	985	75.77
Robe of the Magi	6	450	75
Rod of Atos	26	3080	118.46
Scythe of Vyse	35	5700	162.86
Shiva's Guard	30	4750	158.33
Silver Edge	45	5550	123.33
Staff of Wizardry	10	1000	100
Ultimate Orb	10	2150	215
Urn of Shadows	2	875	437.5
Veil of Discord	18	2340	130
Vladmir's Offering	2	2275	1137.5
Wraith Band	6	485	80.83
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	10	6400	640
Armlet of Mordiggian	40	2370	59.25
Battle Fury	55	4500	81.82
Black King Bar	24	3975	165.63
Blade Mail	22	2200	100
Blades of Attack	9	420	46.67
Bloodthorn	60	7195	119.92
Bracer	3	490	163.33
Broadsword	18	1200	66.67
Butterfly	30	5525	184.17
Claymore	21	1400	66.67
Crystalys	30	2120	70.67
Daedalus	80	5320	66.5
Dagon 1	9	2720	302.22
Dagon 2	9	3970	441.11
Dagon 3	9	5220	580
Dagon 4	9	6470	718.89
Dagon 5	9	7720	857.78
Demon Edge	42	2200	52.38
Desolator	50	3500	70
Divine Rapier	330	6000	18.18
Drum of Endurance	3	1640	546.67
Echo Sabre	15	2650	176.67
Faerie Fire	2	70	35
Heaven's Halberd	25	3400	136
Javelin	10	1500	150
Linken's Sphere	15	4850	323.33
Lotus Orb	10	4000	400
Maelstrom	24	2800	116.67
Mask of Madness	20	1975	98.75
Mithril Hammer	24	1600	66.67
Mjollnir	24	5700	237.5
Monkey King Bar	66	5200	78.79
Morbid Mask	10	1100	110
Null Talisman	3	470	156.67
Oblivion Staff	10	1650	165
Orchid Malevolence	30	4075	135.83
Perseverance	10	1700	170
Phase Boots	24	1240	51.67
Quarterstaff	10	875	87.5
Radiance	65	5150	79.23
Refresher Orb	20	5200	260
Ring of Aquila	10	985	98.5
Ring of Basilius	7	500	71.43
Rod of Atos	6	3080	513.33
Sacred Relic	60	3800	63.33
Sange	10	1950	195
Sange and Yasha	16	3900	243.75
Satanic	50	5700	114
Shadow Blade	22	2700	122.73
Silver Edge	30	5550	185
Skull Basher	10	2700	270
Veil of Discord	6	2340	390
Wraith Band	3	485	161.67
Values may include portions from actives or auras.

Attack damage increasing abilities

Percentage bonus

• Alpha Wolf - Packleader's Aura
  
  Attack Damage Bonus: 30%
  Radius: 900
  
• Double Damage Rune - Double Damage
  
  Attack Damage Bonus: 100%
  Duration: 45
  
• Earthshaker - Enchant Totem
  
  Attack Damage Bonus: 100%/200%/300%/400%
  Duration: 14
  Number of Attacks: 1
  
• Illusions - Illusion
  
  Based on the ability the illusion is created by, it may deal more attack damage than the hero it is based on.
• Lycan - Feral Impulse
  
  Attack Damage Bonus: 15%/26%/37%/48%
  Radius: 900
  Affects units under Lycan's control only.
• Magnus - Empower
  
  Attack Damage Bonus: 20%/30%/40%/50% ( 30%/40%/50%/60%)
  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%/20%/28%/36% ( 32%/40%/48%/56%)
  Radius: 900
  
• Vladmir's Offering - Vladmir's Aura
  
  Attack Damage Bonus: 15%
  Radius: 900
  

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: 20%/26%/32%/38% ( 26%/32%/38%/44%)
  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: 10/14/18 ( 50/54/58)
  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.
• 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: 18/24/30/36 ( 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: 50/100/150
  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, but not by spell damage amplification.

• Abyssal Blade - Bash
  
  Proc Chance (Melee): 25%
  Proc Chance (Ranged): 10%
  Damage: 85
  Damage applies to the proccing attack. Magical damage.
• Anti-Mage - Mana Break
  
  Mana Burned per Hit: 28/40/52/64
  Burned Mana as Damage: 60%
  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
  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.
• Iron Talon - Quell
  
  Melee Attack Damage Bonus: 24
  Ranged Attack Damage Bonus: 7
  Damage only applies against non-hero units.
• Javelin - Pierce
  
  Proc Chance: 25%
  Damage: 85
  Damage applies to the proccing attack. Magical damage.
• Kunkka - Tidebringer
  
  Attack Damage Bonus: 25/45/65/85
  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.
• Monkey King - Jingu Mastery
  
  Charges: 4
  Attack Damage Bonus: 80/120/160/200
  Grants Monkey King bonus attack damage for 4 attacks after having attacked the same enemy hero 4 times.
• Monkey King Bar - Mini-Bash
  
  Proc Chance: 35%
  Damage: 160
  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.
• 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: 85
  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: 15/40/65/90
  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 ( 25/30/35/40)
  Damage applies to each attack and grows stronger with consecutive attacks on the same target.
• Viper - Nethertoxin
  
  Base Attack Damage Bonus: 3/6/9/12
  Maximum Attack Damage Bonus: 48/96/144/192
  Damage depends on a percentage of the attacked unit's maximum health doubling for each 20% of health missing. Deals half damage to non-hero units.

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
  
  Main Attack Damage Reduction: 35%
  
• Drow Ranger - Marksmanship
  
  Splinter Attack Damage Reduction: 50%
  The splinter damage is based on the hero attack value when the secondary splinter itself is released. The damage reduction is applied after 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.
• Medusa - Split Shot
  
  Attack Damage Reduction: 20%
  The damage reduction is applied before the damage block. Allows Medusa to attack multiple targets at once, reducing her own attack damage in return.
• 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: 10%/20%/30%/40%
  
• Vengeful Spirit - Vengeance Aura
  
  Main Attack Damage Reduction: 12%/20%/28%/36% ( 32%/40%/48%/56%)
  
• 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
  Creep Attack Damage Reduction: 10/13/15/17
  

See also

• Table of hero attributes