Attack Damage

^2a Requires

^2b Requires

³ Main attack damage is only reduced for the instant attack so that only the ability can use it.

⁴ Total attack damage is only reduced for the

Tempest Double if the penalty distance is exceeded or Arc Warden is dead.

Main Attack Damage[edit]

Main Article: Heroes' Main Attack Damage Table

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 grants bonus attributes.

Primary Attribute	Main Attack Damage/Point	Scaling Attributes
Strength	+1
Agility	+1
Intelligence	+1
Universal	+0.45

Main Attack Damage is defined as

Main Attack Damage = (Base Attack Damage + Σ Primary Attribute) × <math>\prod_{i=1}^{n}</math>(1 - Modifiers _i)

For a detailed table of all 126 heroes' main attack damage, please refer to this page.

Main Attack Damage Sources[edit]

The following items and abilities manipulates the primary attribute of the hero, and therefore increasing its main attack damage.

Main Attack Damage Increasing Sources

Attributes - Attribute Bonus

All Attribute Bonus: 2/4/6/8/10/12/14
If all ability points are spend on their respective levels, Attribute Bonus levels up automatically on the levels 17/19/21/22/23/24/26.
Apex
[[File:|64px|text-top|link=Apex#]]
Primary Attribute Bonus: 70
Universal All Attribute Bonus: 25
Provides a lesser bonus to all attributes for Universal heroes.
Power Treads - Switch Attribute

Selected Attribute Bonus: 10
Passively grants the owner of the item a bonus to the current selected attribute. Can be cast to switch the bonus from Strength ➜ Intelligence, Intelligence ➜ Agility and Agility ➜ Strength.
Vambrace - Switch Attribute

Selected Attribute Bonus: 10
Other Attributes Bonus: 4
Passively grants the owner of the item a bonus to all attributes. Bonus for selected attribute is doubled. Can be cast to switch the bonus from Strength ➜ Intelligence, Intelligence ➜ Agility and Agility ➜ Strength.This is an old ability.

Strength[edit]

Bonus Strength

Item	Value	Item Cost	Cost/Value Point
Abyssal Blade	26	6250	240.38
Aghanim's Scepter	10	4200	420
Belt of Strength	6	450	75
Black King Bar	10	4050	405
Boots of Bearing	8	4225	528.13
Bracer	5	505	101
Circlet	2	155	77.5
Crown	4	450	112.5
Diadem	6	1000	166.67
Dragon Lance	10	1900	190
Drum of Endurance	7	1625	232.14
Echo Sabre	15	2700	180
Eternal Shroud	10	3700	370
Ethereal Blade	8	5375	671.88
Eye of Skadi	22	5300	240.91
Gauntlets of Strength	3	140	46.67
Ghost Scepter	5	1500	300
Harpoon	25	4700	188
Heart of Tarrasque	40	5200	130
Heaven's Halberd	5	2600	520
Helm of the Dominator	6	2625	437.5
Helm of the Overlord	21	5725	272.62
Holy Locket	9	2250	250
Hurricane Pike	15	4450	296.67
Iron Branch	1	50	50
Kaya and Sange	16	4200	262.5
Khanda	8	5900	737.5
Linken's Sphere	16	4800	300
Magic Wand	3	450	150
Manta Style	10	4650	465
Meteor Hammer	6	2850	475
Null Talisman	2	505	252.5
Ogre Axe	10	1000	100
Overwhelming Blink	25	6800	272
Phylactery	7	2600	371.43
Power Treads (Strength)	10	1400	140
Reaver	25	2800	112
Sange	16	2100	131.25
Sange and Yasha	16	4200	262.5
Satanic	25	5050	202
Shiva's Guard	5	5175	1035
Skull Basher	10	2875	287.5
Solar Crest	4	2575	643.75
Soul Ring	6	805	134.17
Ultimate Orb	15	2800	186.67
Veil of Discord	4	1725	431.25
Wraith Band	2	505	252.5
Values do not include portions from actives or auras.

Strength Increasing Sources

¹ Requires

^2a Requires

^2b Requires

Agility[edit]

Bonus Agility

Item	Value	Item Cost	Cost/Value Point
Aghanim's Scepter	10	4200	420
Band of Elvenskin	6	450	75
Blade of Alacrity	10	1000	100
Bracer	2	505	252.5
Butterfly	35	5450	155.71
Circlet	2	155	77.5
Crown	4	450	112.5
Diadem	6	1000	166.67
Diffusal Blade	15	2500	166.67
Disperser	40	6100	152.5
Dragon Lance	15	1900	126.67
Eaglesong	25	2800	112
Ethereal Blade	8	5375	671.88
Eye of Skadi	22	5300	240.91
Ghost Scepter	5	1500	300
Harpoon	10	4700	470
Heaven's Halberd	5	2600	520
Helm of the Dominator	6	2625	437.5
Helm of the Overlord	21	5725	272.62
Holy Locket	9	2250	250
Hurricane Pike	20	4450	222.5
Iron Branch	1	50	50
Khanda	8	5900	737.5
Linken's Sphere	16	4800	300
Magic Wand	3	450	150
Manta Style	26	4650	178.85
Meteor Hammer	6	2850	475
Null Talisman	2	505	252.5
Orb of Corrosion	7	1000	142.86
Phylactery	7	2600	371.43
Power Treads (Agility)	10	1400	140
Sange and Yasha	16	4200	262.5
Shiva's Guard	5	5175	1035
Slippers of Agility	3	140	46.67
Solar Crest	4	2575	643.75
Swift Blink	25	6800	272
Ultimate Orb	15	2800	186.67
Veil of Discord	4	1725	431.25
Wraith Band	5	505	101
Yasha	16	2100	131.25
Yasha and Kaya	16	4200	262.5
Values do not include portions from actives or auras.

Agility Increasing Sources

¹ Requires

^2a Requires

^2b Requires

Intelligence[edit]

Bonus Intelligence

Item	Value	Item Cost	Cost/Value Point
Aghanim's Scepter	10	4200	420
Arcane Blink	25	6800	272
Bloodthorn	10	6625	662.5
Boots of Bearing	8	4225	528.13
Bracer	2	505	252.5
Circlet	2	155	77.5
Crown	4	450	112.5
Crude Enchantment	Expression error: Unexpected < operator.	N/A	N/A
Diadem	6	1000	166.67
Diffusal Blade	10	2500	250
Disperser	10	6100	610
Drum of Endurance	7	1625	232.14
Ethereal Blade	8	5375	671.88
Eul's Scepter of Divinity	10	2600	260
Eye of Skadi	22	5300	240.91
Force Staff	10	2200	220
Ghost Scepter	5	1500	300
Gleipnir	15	4550	303.33
Harpoon	10	4700	470
Heaven's Halberd	5	2600	520
Helm of the Dominator	6	2625	437.5
Helm of the Overlord	21	5725	272.62
Holy Locket	9	2250	250
Hurricane Pike	15	4450	296.67
Iron Branch	1	50	50
Kaya	16	2100	131.25
Kaya and Sange	16	4200	262.5
Khanda	8	5900	737.5
Linken's Sphere	16	4800	300
Magic Wand	3	450	150
Manta Style	10	4650	465
Mantle of Intelligence	3	140	46.67
Meteor Hammer	24	2850	118.75
Mystic Staff	25	2800	112
Null Talisman	5	505	101
Oblivion Staff	10	1625	162.5
Orchid Malevolence	10	3275	327.5
Parasma	40	5975	149.38
Phylactery	7	2600	371.43
Power Treads (Intelligence)	10	1400	140
Robe of the Magi	6	450	75
Rod of Atos	15	2250	150
Scythe of Vyse	30	5200	173.33
Shiva's Guard	5	5175	1035
Solar Crest	4	2575	643.75
Staff of Wizardry	10	1000	100
Ultimate Orb	15	2800	186.67
Veil of Discord	4	1725	431.25
Wind Waker	35	6800	194.29
Witch Blade	12	2775	231.25
Wraith Band	2	505	252.5
Yasha and Kaya	16	4200	262.5
Values do not include portions from actives or auras.

Intelligence Increasing Sources

¹ Requires

^2a Requires

^2b Requires

Universal[edit]

Damage from All Attribute Items for Universal Heroes

Item	Value	Item Cost	Cost/Value Point
Aghanim's Scepter	13.5	4200	311.11
Bracer	4.05	505	124.69
Circlet	2.7	155	57.41
Crown	5.4	450	83.33
Diadem	8.1	1000	123.46
Ethereal Blade	10.8	5375	497.69
Evolved Enchantment	32.4	N/A	N/A
Eye of Skadi	29.7	5300	178.45
Ghost Scepter	6.75	1500	222.22
Harpoon	20.25	4700	232.1
Heaven's Halberd	6.75	2600	385.19
Helm of the Dominator	8.1	2625	324.07
Helm of the Overlord	28.35	5725	201.94
Holy Locket	12.15	2250	185.19
Hurricane Pike	22.5	4450	197.78
Iron Branch	1.35	50	37.04
Khanda	10.8	5900	546.3
Linken's Sphere	21.6	4800	222.22
Magic Wand	4.05	450	111.11
Manta Style	20.7	4650	224.64
Meteor Hammer	16.2	2850	175.93
Null Talisman	4.05	505	124.69
Phylactery	9.45	2600	275.13
Shiva's Guard	6.75	5175	766.67
Solar Crest	5.4	2575	476.85
Ultimate Orb	20.25	2800	138.27
Veil of Discord	5.4	1725	319.44
Wraith Band	4.05	505	124.69
Values do not include portions from actives or auras.

Talents

Reducing Sources[edit]

Some abilities reduce main attack damage based on percentages, and some abilities manipulate the primary attribute of the hero, therefore reducing its main attack damage.

Main Attack Damage Reducing Sources

Lycan – Howl
Medusa – Split Shot
Morphling – Attribute Shift (Strength Gain)
Rubick – Fade Bolt
Silencer – Glaives of Wisdom
Slark – Essence Shift
Tidehunter – Anchor Smash
Timbersaw – Whirling Death
Underlord – Atrophy Aura
Undying – Decay
Windranger – Focus Fire

¹ Requires

^2a Requires

^2b Requires

Base Attack Damage[edit]

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 the minimum and maximum is chosen to help decide the damage output.

The most extreme hero example of this is Chaos Knight, with his base attack damage ranging between 24 – 54, causing his damage output to be somewhat unpredictable. This range of 30 is always part of his attack calculations, no matter how many attributes or how much bonus attack damage he acquires.

Base Attack Damage Increasing Sources

¹ Requires

Talents[edit]

Base Attack Damage

Passive

Affects

Self

Base Attack Damage Bonus: Varies

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

Bonus	Level 10		Level 15		Level 20		Level 25
Bonus	Left	Right	Left	Right	Left	Right	Left	Right
Base Damage

Bonus Attack Damage[edit]

Bonus attack damage is the attack damage value shown in green numbers with a plus on the left, right after the white attack damage number on a unit's statistics. Whenever a bonus attack damage granting item or ability shows a +Attack Damage, e.g. Blades of Attack +9 Damage, it increases the bonus attack damage of the affected unit.

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

There are two types of bonus attack damage:

Flat Bonuses: Adds a flat number of damage to the unit's damage total (e.g. Phase Boots etc.).
Main Attack Damage Percentage Bonuses: Adds an amount of bonus attack damage equal to a percentage of the affected unit's main attack damage (e.g. Vladmir's Offering, Packleader's Aura etc.). While bonus attack damage is usually positive values, it can also use a negative value to reduce a unit's net attack damage (e.g. Static Link etc.).

Bonus Attack Damage is defined as

Bonus Attack Damage = (Main Attack Damage × <math>\prod_{i=1}^{n}</math>(1 + Bonus Value Modifiers _i) + Flat Bonus Values

Bonus Attack Damage Sources[edit]

Percentage Bonuses[edit]

Abilities Granting Percentage Bonus

¹ Requires

facet.

Magical Attack Damage Bonus[edit]

Pure Attack Damage Bonus[edit]

Set Attack Damage[edit]

Attack Classes[edit]

There are currently 3 different classes of attack damage types (also known as 'Attack Classes) that manipulate the damage value of a unit's attack against certain other unit types. Each attack classes deal either reduced, increased, or unchanged damage against heroes, creeps (i.e. non-hero units), and buildings, before all armor reduction values.

The attack classes are represented by 3 abilities visible in the unit's HUD. If a unit does not have any of these 3 abilities, their attacks deal 100% damage and are only altered by the target's armor and other damage manipulators.

Runty[edit]

Runty

Passive

Affects

Self

Units of this attack classification deal reduced attack damage to heroes.

Hero Factor:

0.75

Units of this attack classification deal reduced attack damage to Reinforced units.

Unit Factor:

0.7

Piercing[edit]

Piercing

Passive

Affects

Self

Units of this attack classification deal reduced attack damage to heroes.

Hero Factor:

0.5

Units of this attack classification deal increased attack damage to creeps.

Unit Factor:

1.5

Units of this attack classification deal greatly reduced attack damage to Reinforced units.

Unit Factor:

0.35

Reinforced[edit]

Reinforced

Passive

Affects

Self

Units of this attack classification take less damage from heroes, illusions, and summoned units.

Hero Factor:

0.5

Illusion Factor:

0.6

Summoned Unit Factor:

0.9

Units of this attack classification take less damage from Runty attacks.

Runty Factor:

0.7

Units of this attack classification take less damage from Piercing attacks.

Piercing Factor:

0.35

Units of this attack classification deal greatly increased damage to Reinforced units.

Unit Factor:

2.5

Attack Class Definition[edit]

Attack damage dealt against unit-types can be defined as

Attack Damage Dealt = Total Attack Damage × Attack Class × Damage Manipulation

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

Attack Class	Used by	Damage Against Unit Type
Attack Class	Used by	Hero	Non-Hero	Reinforced
Default	Heroes, Clones, Illusions, Creep-Heroes and every single non-hero unit that is not explicitly listed in another attack class	100%	100%	50% / 70% / 100%
Runty	Super Melee Creep Mega Melee Creep Flagbearer Creep Super Flagbearer Creep Mega Flagbearer Creep Melee Creep	75%	100%	70%
Piercing	Ghost Massive Serpent Ward Super Ranged Creep Mega Ranged Creep Ranged Creep Hill Troll Berserker Hill Troll Priest Vhoul Assassin Harpy Scout Harpy Stormcrafter Hill Troll Plague Ward Serpent Ward	50%	150%	35%
Reinforced	Siege Creep Tower (Tier 1)Tower (Tier 2)Tower (Tier 3)Tower (Tier 4)Super Siege Creep Mega Siege Creep Greater Treant Fountain Melee Barracks Ranged Barracks	100%	100%	250%

Instant Attacks[edit]

Instant Attacks are abilities that uses the hero's regular attack damage values as ability damage to the target unit(s) or area. Instant Attacks do not use the hero's attack animation, are independent from attack speed, and ignores the regular downtime between attacks. Certain abilities that deal instant attack damage are not affected by evasion. 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 attacks. Instant Attacks do not interfere with any other actions of the hero either, meaning they neither interrupt movement, nor cancel ability casts nor stop channeling abilities.

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 (e.g. Untouchable or Moment of Courage). However, they can proc effects which react on attack hit (e.g. Counter Helix or 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. Evasion and blind fully work against instant attacks. Just like regular attacks, most instant attacks also cause the attacking hero to get revealed under Disguise and/or when attacking from the Fog of War unless stated in their respective ability notes.

Source	Properties
Source	Trigger Attack Modifier	Has True Strike?	Ignore disarm?	Trigger spell lifesteal
Burning Barrage	Yes	Yes	Yes	Yes
Tar Bomb	Yes			No
Starbreaker	Yes	Yes	Yes	No
Shadow Wave	Yes	No	No	Yes
Sleight of Fist	Yes		No	Yes
Sproink	Yes		No	No
Flak Cannon				No
Flak Cannon (Side Gunner)	Yes		Yes	Yes
Acorn Shot	Yes		Yes	No
Omnislash	Yes		Yes	No
Swiftslash	Yes		Yes	No
Moment of Courage	Yes		No	Yes
Infest	Yes		Yes	Yes
God's Rebuke	Yes	Yes	Yes	No
Bulwark	Yes		No	Yes
Split Shot				No
Split Shot	Yes			No
Boundless Strike	Yes	Yes	Yes	No
Waveform	Yes		Yes	No
Gunslinger	Yes			Yes
Swashbuckle	Yes	Yes	Yes	No
Shield Crash	Yes	Yes	Yes	No
Stifling Dagger	Yes	Yes	Yes	Yes
Phase Shift	Yes		Yes	Yes
Dream Coil	Yes		Yes	Yes
Tricks of the Trade	Yes		Yes	No
Lil' Shredder (Multishot)	Yes			Yes
Ricochet II facet			Yes	Yes
Anchor Smash	Yes	Yes	Yes	No
Tree Throw	Yes	Yes	Yes	Yes
Tree Volley	Yes	Yes	Yes	Yes
Astral Step	Yes	Yes	Yes	No
Mass Serpent Ward	--			--
Assassinate	Yes	Yes	Yes	Yes
Geminate Attack	Yes		Yes	No
Shukuchi	Yes		Yes	Yes
Echo Slash	Yes		Yes	No
Falcon Rush	Yes		Yes	No
Kazurai Katana	Yes	Yes	Yes	No

Ignore disarm? - Most instant attacks' rule for interaction with disarm is relatively intuitive: if the instant attack is generated outside of normal attack animation, it ignores disarm. If it is generated together with a normal attack animation (e.g. various multishot instant attacks), then the attack is trivially not generated due to the normal attack not being allowed. The few exceptions are highlighted in bold.

Attack-based Projectiles[edit]

Some abilities generate projectiles that are based on an attack, but are technically not an attack. These abilities' projectiles use the source's attack projectile, and deal damage based on the attacking unit's attack damage, and have their damage flagged as attack damage as well, but are not counted as attacks otherwise. Instead, they are treated like regular ability projectiles (like e.g. Magic Missile), and therefore cannot trigger attack modifier or on-hit effects, ignore evasion and blind, and do not reveal the attacking units through the Fog of War. This also means that these abilities continue to use projectiles even when their source is a melee hero.

Instant Attack Sources That Trigger Attack Modifier

¹ Requires

^2a Requires

^2b Requires

Attack Immunity[edit]

Main Article: Attack Immunity

Instant attacks may target attack immune units if they are ranged instant attacks, but will have no effect when the unit is still attack immune on impact. Instant melee attacks cannot target attack immune units.

Conditional Attack Damage Bonus[edit]

These abilities give direct attack damage bonuses under certain circumstances, these bonuses are not displayed in the HUD and its damage type is not limited to physical damage; nonetheless, they are considered as attack damage since it is dealt in one instance together with a unit's attack damage.

They are affected by attack classes (even when dealing magical or pure damage). It is also not affected by percentage-based attack damage bonuses or reductions, but can be reduced with flat reductions (i.e. Damage Block).

Conditional Attack Damage Bonus (as Physical Damage)

¹ Requires a

^2a Requires

^3b Requires

³ Grants conditional attack damage bonus on the attack that breaks invisibility.

⁴ Damage amplified is considered as conditional attack damage bonus for this ability.

Magical Attack Damage Bonus[edit]

Conditional Attack Damage Bonus (as Magical Damage)

Pure Attack Damage Bonus[edit]

Conditional Attack Damage Bonus (as Pure Damage)

Bloodseeker – Bloodrage^2b

¹ Requires a

^2a Requires

^2b Requires