Attack Speed

Attack Speed is the rate at which a unit can use their Basic Attack. Attack Speed is measured in attacks per second, so higher attack speed values mean more attacks per second and lower attack speed values mean the opposite. Attack speed and attack damage are multiplied to show a Hero's damage per second (dps).

Effects that grant or reduce Attack Speed stack additively with each other. There is no upper limit to total Attack Speed (rather it is unrealistically high), but it cannot be reduced below 25% of its base value.

Abilities and Talents that affect self Attack Speed

 * Alarak's level 1 talent, "Overwhelming Power", grants him 40% increased Attack Speed when hitting an enymy Hero with Discord Strike.
 * Ana's level 20 talent, "Dynamic Optics", grants her 10% increased Attack Speed for 3 seconds when hitting enemy Heroes with Basic Attacks, stacking up to 100% increased Attack Speed.
 * Anduin's level 4 talent, "Inner Fire", permanently grants him 20% increased Attack Speed.
 * Artanis's level 7 talent, "Chrono Surge", grants him 40% increased Attack Speed for 5 seconds when hitting an enemy Hero wih Phase Prism.
 * Artanis's level 16 talent, "Blades of a Templar", permanently grants him 30% increased Attack Speed.
 * Arthas's level 4 talent, "Icy Talons", grants him 3% increased Attack Speed for 1.5 seconds every time a Hero is damaged by Frozen Tempest, stacking up to 60% increased Attack Speed.
 * Blaze's level 1 talent, "Adrenaline Stimpack", grants him 25% increased Attack Speed while over 80% Health and can be activated to gain 100% increased Attack Speed for 5 seconds.
 * The Butcher's baseline quest, "Fresh Meat", permanently grants him 25% increased Attack Speed when completed.
 * The Butcher's level 16 talent, "Enraged", grants him 40% increased Attack Speed for 10 seconds when taking damage below 50% of his maximum Health (Cooldown: 25 seconds).
 * The Butcher's level 16 talent, "Blood Frenze", grants him 5% increased Attack Speed for 3 seconds when hitting enemy Heroes with Basic Attacks, stacking up to 25% increased Attack Speed.
 * Cassia's level 1 talent, "Charged Strikes", permanently grants her 15% increased Attack Speed.
 * Chen's heroic ability, "Storm, Earth, Fire - Fire" grants his spirits 50% increased Attack Speed for 5 seconds. Grants 75% increased Attack Speed instead when cast last.
 * Chen's level 16 talent, "Combo Strikes", grants him 35% increased Attack Speed while he has Shields from Fortifying Brew and for 2 seconds after.
 * Cho's level 16 talent, "Frenzied Fists", grants him 75% increased Attack Speed for 5 seconds after using Surging Fist.
 * Diablo's level 13 talent, "Cruelty", grants him 50% increased Attack Speed for 7 seconds after stunning an enemy with Shadow Charge or Overpower, stacking up to 100% increased Attack Speed.
 * Falstad's level 1 talent, "Seasoned Marksman", grants him 40% increased Attack Speed for 4 seconds when activated after reaching 40 bonus Attack damage.
 * Falstad's level 20 talent, "Nexus Frenzy", permantently grants him 20% increased Attack Speed.
 * Fenix's level 7 talent, "Warp Warfare", grants him 175% increased Attack Speed for 4 seconds while in Repeater Cannon mode after arriving with Warp.
 * Fenix's level 20 talent, "Singularity Charge", increased Repeater Cannon's bonus Attack Speed by another 100%, for a total 250% increased Attack Speed.
 * Gazlowe's level 13 talent, "Positive Reinforcement", grants him 40% increased Attack Speed for 3 seconds when Primary Rock-it! Turret attacks hit enemy Heroes.
 * Greymane's basic ability, "Inner Beast", grants him 50% increased Attack Speed for 3 seconds, with Basic Attacks refreshing this duration.
 * Greymane's level 16 talent, "Eager Wolf", increases Inner Beast's Attack Speed bonus by an additional 40% after it has been active for 4 seconds.
 * Hanzo's level 1 talent, "Redemption", grants him 50% increased Attack Speed while the quest part is completed.
 * Illidan's level 20 talent, "Demonic Form", grants him 20% increased Attack Speed while in Demonic Form and lets him permanently remain in Demonic Form.
 * Imperius's level 16 talent, "Celestial Swiftness", grants him 40% increased Attack Speed for 5 seconds for each enemy Hero stunned with Celestial Charge.
 * Kharazim's basic ability, "Deadly Reach", grants him 100% increased Attack Speed and Range for 2 seconds.
 * Leoric's level 16 talent, "Mithril Mace", permanently grants him 20% increased Attack Speed as well as an additional 0.3% per nearby enemy Minion death and 3% per Takedown, stacking up to 30% for a total of 50% increased Attack Speed.
 * The Lost Vikings's level 7 talent, "Baleog the Fierce", grants Baleog 50% increased Attack Speed while Olaf and Erik are nearby.
 * Lunara's level 16 talent, "Invigoratin Spores", grants her 30% increased Attack Spores for 6 seconds after casting Crippling Spores.
 * Maiev's level 20 talent, "Shadow Orb: Huntress", grants her 40% increased Attack Speed for 5 seconds when activated.
 * Mal'Ganis's level 16 talent, "Frenzied Assault", grants him 35% increased Attack Speed for 2 seconds when hitting enemy Heroes with a lower Health percentage with Basic Attacks.
 * Mei's level 13 talent, "Flurry", grants her 50% increased Attack Speed while standing in her own Blizzard and for 3 additional seconds if she is in her Blizzard when it ends.
 * Nova's level 7 talent, Anti-Armor Shellfs, permanently decreases her Attack Speed by 60%, but increases her Basic Attack Damage by 250%.
 * Qhira's level 1 talent, "Finishing Touch", grants her 35% increased Attack Speed for 3 seconds when hitting an enemy Hero below 50% Health with Basic Attacks.
 * Raynor's basic Ability, "Inspire", grants him and nearby allied Minions and Mercenaries 30% increased Attack Speed for 4 seconds.
 * Raynor's level 20 talent, "Execute", permanently grants him 20% increased Attack Speed.
 * Rexxar's level 13 talent, "Aspect of the Hawk" grants him 125% increased Attack Speed for 4 seconds when Spirit Swoop hits an enemy Hero.
 * Samuro's level 16 talent, "Press the Attack", grants him and his Mirror Images 10% increased Attack Speed every time they attack while Advancing Strikes is active, stacking up to 40% increased Attack Speed.
 * Sgt. Hammer's level 20 talent, "Ultra Capacitors", grants her 5% increased Attack Speed for 5 seconds when hitting enemy Heroes with Basic Attacks while in Siege Mode, stacking up to 40% increased Attack Speed.
 * Stitches's level 4 talent, "Chop Chop", grants him 25% increased Attack Speed for 3 seconds, when hitting an enemy Hero with Slam. Grants instead 50% increased Attack Speed when hitting an enemy Hero with Slam's inner impact area.
 * Sylvanas's level 1 talent, "Might of the Banshee Queen", grants her 5% increased Attack Speed for 6 seconds when hitting enemy Heroes with Withering Fire, stacking up to 25% increased Attack Speed.
 * Tychus's level 4 talent, "Master Assassin", permanently grants him 10% increased Attack Speed as well as an additional 1% per Takedown, stacking up to 15% for a total of 25% increased Attack Speed.
 * Tyrael's level 20 talent, "Seal of El'druin", grants him 50% increased Attack Speed for 3 seconds whenever he uses a Basic Ability.
 * Tyrande's level 20 talent, "Iceblade Arrows", permanently grants her 20% increased Attack Speed.
 * Valeera's level 7 talent, "Slice and Dice", grants her 150% increased Attack Speed for 3 seconds or the next 3 Basic Attacks when Eviscerating an enemy with 3 Combo Points.
 * Valla's level 4 talent, "Creed of the Hunter", permanently grants her 10% increased Attack Speed.
 * Valla's level 20 talent, "Rancor", grants her 2% increased Attack Speed for each stack of Hatred, stacking up to 20% increased Attack Speed, and also grants her an additional 30% when at 10 stacks, for a total of 50% increased Attack Speed.
 * Varian's heroic ability, "Twin Blades of Fury", permanently grants him 100% increased Attack Speed, but reduces his Basic Attack Damage by 25%.
 * Whitemane's level 1 talent, "Righteous Flame", grants her 25% increased Attack Speed for 4 seconds when hitting enemy Heroes with the second strike of Searing Lash.
 * Xul's level 13 talent, "Rapid Harvest", grants him 5% increased Attack Speed for 3 seconds when hitting enemies with Cursed Strikes, stacking up to 75% increased Attack Speed.
 * Zeratul's level 4 talent, "Darkness Descends", permanently grants him 20% increased Attack Speed and can be activated to graint an additional 40% increased Attack Speed for 5 seconds, for a total of 60% increased Attack Speed.
 * Zul'jin's passive ability, "Berserker", grants him 1% increased Attack Speed for every missing 1% of maximum Health, stacking up to 99% increased Attack Speed.
 * Zul'jin's level 7 talent, "Ferocity", increased Berserker's Attack Speed bonus by 40%, granting Zul'jin 1.4% increased Attack Speed for every missing 1% of maximum Health, stacking up to 138.6% increased Attack Speed.
 * Zul'jin's level 16 talent, "Let the Killing Begin", grants him 5% increased Attack Speed for 12 seconds when killing an enemy, stacking up to 40% increased Attack Speed, with Basic Attacks refreshing the duration and Hero Takedowns instantly granting 40% increased Attack Speed.
 * Zul'jin's level 16 talent, "Let the Killing Begin", grants him 5% increased Attack Speed for 12 seconds when killing an enemy, stacking up to 40% increased Attack Speed, with Basic Attacks refreshing the duration and Hero Takedowns instantly granting 40% increased Attack Speed.

Abilities and Talents that affect allied Attack Speed

 * Abathur's level 4 talent, "Adrenal Overload", adds an additional effect to his "Symbiote", granting 25% increased Attack Speed to the allied Heroes affected by it.
 * Auriel's level 16 talent, "Will of Heaven", adds an additional effect to her "Bestow Hope" trait, granting 20% increased Attack Speed to the allied Heroes affected by it.
 * Lt. Morales's heroic ability, "Stim Drone", increases target allied Hero's Attack Speed by 75% for 10 seconds.
 * Raynor's level 13 talent, Rallying Cry, grants nearby allied Heroes 10% increased Attack Speed for 5 seconds when casting Inspire.
 * Rehgar's heroic ability, "Bloodlust", grants nearby allied Heroes 40% increased Attack Speed for 6 seconds.
 * Tyrael's level 7 talent, "Swift Retribution", adds an additional effect to his "Smite" ability, granting 25% increased Attack Speed to the allieds Heroes affected by it for 2 seconds.

Abilities and Talents that affect enemy Attack Speed

 * "Imposing Presence" passively slows Attack Speed of Heroes and Summons that attack your Hero by 20% for 2.5 seconds and can be activated to slow enemy Heroes and Summons' Attack Speed by 50% for 2.5 seconds (Cooldown: 20 seconds). This talent is available for:
 * E.T.C. as a level 16 talent, "Imposing Presence"
 * Muradin as a level 16 talent, "Imposing Presence"
 * Johanna as a level 16 talent, "Imposing Presence"
 * Rexxar as a level 16 talent, "Primal Intimidation" (affects both Rexxar and Misha)
 * Arthas's basic ability, "Frozen Tempest", slow enemy Attack Speed by 10% per second for 1.5 seconds, stacking up to 40% decreased Attack Speed.
 * Arthas's level 4 talent, "Frozen Wastes", increases the duration of Frozen Tempest's Attack and Movement Speed Slows by another 1.5 seconds, for a total of 3 seconds.
 * Arthas's level 20 talent, "Death's Advance", increases Frozen Tempest's maximum Attack and Movement Speed Slows from 40% to 60%.
 * Blaze's level 13 talent, "Nanomachine Coating", slows Attack Speed of Enemies standing in Oil Spills and ignited Oil Spills by 50% for 2.5 seconds.
 * Garrosh's level 7 talent, "Indimidation", reduces the Attack Speed of Heroes hit with Groundbreaker by 40% for 4 seconds.
 * Mei's level 13 talent, "Polar Vortex", grants her an aura that damages and slows enemy Heroes' Attack Speed by 20% whenever she uses an ability.
 * Muradin's basic ability, "Thunder Clap", slows enemy Attack Speed by 30% for 2.5 seconds.
 * Muradin's level 4 talent, "Reverbation", increases Thunder Clap's enemy Attack Speed debuff from 30% to 50% and its duration from 2.5 seconds to 3.5 seconds.
 * Rehgar's level 7 talent, "Grounded Totem", adds an additional effect to his "Earthbind Totem" ability, slowing the Attack Speed of enemy Heroes affected by it by 40%.
 * Xul's basic ability, "Cursed Strikes", slows enemy Attack Speed by 40% for 2 seconds.
 * Xul's basic ability, "Cursed Strikes", slows enemy Attack Speed by 40% for 2 seconds.