Slow

A unit that is Slowed has reduced Movement Speed for the duration, indicated by a purple whirl at the unit's feet. Slows subtract a percentage of a unit's movement speed, with most heroes naturally moving at the base speed of 100% so a 20% slow would reduce a heroes' movement speed to 80%. Slows can prevent a unit from positioning correctly, however unlike a Root they do not have any effect on dash or teleport skills, so a Valla using "Vault" will travel the same distance whether slowed or not slowed. Slows from different sources do not stack so only the one with highest value is effective, but if a lower potency slow lasts longer than a stronger slow it will remain in effect once the strong slow wears off. If a unit is simultaneously affected by a Movement Speed buff and a Slow, the unit's Movement Speed will be determined by their difference.

Basic Abilities

 * Alexstrasza's ability, "Flame Buffet", slows enemies by 40% decaying over 2 seconds if they are already affected by its Damage over Time effect.
 * Her level 4 talent, "Heat Exhaustion", increases the initial slow amount to 50% and removes the decay.
 * Alexstrasza's trait, "Dragonqueen", allows her using "Wing Buffet", slowing enemies hit by 50% for 3 seconds.
 * Anub'arak's ability, "Burrow Charge", slows enemies hit by 25% for 2.5 seconds.
 * Arthas' ability, "Frozen Tempest", continually slows nearby enemies by 10% per second, stacking up to 40%. Effects last for 1.5 seconds.
 * His level 7 talent, "Frozen Wastes", causes it to last 1.5 seconds longer on heroes after the quest is completed.
 * His level 20 talent, "Death's Advance", increases the maximum slow to 60%.
 * Blaze's ability, "Oil Spill", slows enemies as long as they remain in its area of effect by 50%.
 * His level 4 talent, "Oil Dispersal", increases the slow amount to 50%.
 * Brightwing's ability, "Polymorph", slows the target by 25% for 1.25 seconds.
 * The Butcher's ability, "Hamstring", slows enemies hit by 50% fading over 2 seconds.
 * His level 13 talent, "Crippling Slam", makes the slow no longer decay and increases the slow duration to 2.6 seconds.
 * Chen's ability, "Keg Smash", slows enemies hit by 25% for 3 seconds.
 * His level 13 talent, "A Touch of Honey" increases the slow amount to 40%.
 * Deathwing:
 * "Lava Burst" slows enemies within the lava pool by 35%.
 * "Onslaught" slows enemies he passes through by 35% for 2 seconds.
 * His level 13 talent, "Ruination", allows Onslaught's bite to slow enemies by 60% for 1.5 seconds.
 * Deckard's ability, "Horadric Cube", slows enemies hit by 35% for 1.75 seconds.
 * His level 1 talent, "Sapphire", allows him to use "Sapphire" that increases the slow of the next Horadric Cube to 65%.
 * D.Va's ability, "Big Shot", slows enemies hit by 25% for 1.5 seconds.
 * Falstad's ability, "Hammerang", slows enemies hit by 25% for 2 seconds.
 * His level 16 talent, "Crippling Hammer", increases the slow amount to 50% and causes the explosion to also slow.
 * Fenix's ability, "Plasma Cutter", slows enemies hit by 25% for 4 seconds.
 * Garrosh:
 * "Groundbreaker" slows enemies hit by 40% for 2 seconds after the stun effect ends.
 * His level 16 talent, "Seasoned Soldier", increases the duration to 3 seconds.
 * "Wrecking Ball" slows enemies hit by 30% for 2.5 seconds.
 * Hogger's ability, "Ez-Thro Dynamite", slows enemies hit by 30% for 2 seconds.
 * His level 16 talent, "Kablooie!", increases the slow to 50% on a direct hit.
 * Jaina's trait, "Frostbite", makes her ability damage slows enemies hit by 25% for 4 seconds.
 * Her level 1 talent, "Lingering Chill", increases the slow duration to 6 seconds.
 * Her level 20 talent, "Deep Chill", makes the slow effect stack up to 40%.
 * Johanna's ability, "Punish", slows enemies hit by 60% decaying over 2 seconds.
 * Her level 7 talent, "Subdue", increases the slow amount to 80% and removes decay if "Punish" hits 2 heroes.
 * Kel'Thuzad's ability, "Frost Nova", slows enemies hit by the outer part by 35% for 2.5 seconds.
 * His level 13 talent, "Icy Grasp", increase the slow amount by 15%.
 * Leoric:
 * "Skeletal Swing" slows enemies hit by 40% for 2.5 seconds.
 * His level 7 talent, "Paralyzing Rage", increases the slow amount to 60%.
 * "Ghastly Swing" slows enemies hit by 40% for 2.5 seconds.
 * Li Li's ability, "Blinding Winds", slows enemies hit by 15% for 1.5 seconds.
 * Her level 13 talent, "Hindering Winds", increases the slow amount to 30% and duration to 2 seconds.
 * The Lost Vikings' Olaf can charge at an enemy, slowing them by 30% for 3 seconds.
 * Lúcio's trait, "Push Off", slows enemies hit by 75% for 1 second.
 * Lunara's ability, "Crippling Spores", slows enemies afflicted by "Nature's Toxin" by 40% decaying over 3 seconds.
 * Her level 16 talent, "Let Them Wither", increases the slow amount to 50% and causes it no longer decay.
 * Mei:
 * "Snow Blind" slows enemies hit by 35% for 1.5 seconds.
 * Her level 1 talent, "Heavy Pack", increases the duration to 3 seconds.
 * "Blizzard" slows enemies in the area by 7% every 0.25 seconds, stacking up to 35%.
 * "Icing" slows enemies hit by 80%, decaying over 1.5 seconds.
 * Her level 16 talent, "Black Ice", removes the decay on enemies very close to Mei.
 * Mephisto's ability, "Skull Missile", slows enemy heroes hit by 25% for 2 seconds.
 * Muradin's ability, "Thunder Clap", slows enemies hit by 25% for 2.5 seconds.
 * Murky's ability, "Slime", slows enemies hit by 20% for 6 seconds.
 * His level 4 talent, "Slime Time", increases the slow amount to 30% after the quest is completed.
 * Nova's ability, "Pinning Shot", slows the target by 40% for 2.25 seconds.
 * Her level 1 talent, "Covert Ops", increases the slow amount to 55% after being stealthed for 5 seconds and for 1 seconds after breaking the stealth.
 * Probius' ability, "Warp Rift", slows enemies in an area by 25%, lasting 9 seconds or until detonated.
 * His level 16 talent, "Quantum Entanglement", makes the slow linger for 3 seconds after the last contact with a Warp Rift.
 * His level 16 talent, "Gravity Well", increases the slow amount up to 60% the closer the enemies are to the center.
 * Orphea's ability, "Dread", slows enemies hit by 25% for 2 seconds.
 * Her level 1 talent, "Growing Nightmare", increases the slow amount of the explosion by 15% once the quest is completed.
 * Ragnaros' trait, "Molten Core", allows him to use "Meteor Shower", slowing enemies hit by 25% for 2 seconds.
 * Raynor's ability, "Penetrating Round", slows enemies hit by 20% for 2 seconds.
 * His level 7 talent, "Heavy Slugs", increases the slow of the next "Penetrating Round" to 40%.
 * His level 13 talent, "Debilitating Rounds", increases the slow duration to 6 seconds while "Inspire" is active.
 * Rehgar's ability, "Earthbind Totem", slows enemies in its area by 35%, lasts 8 seconds.
 * His level 16 talent, "Earthgrasp Totem", increases the slow amount to 90% for the first second.
 * Rexxar's ability, "Spirit Swoop", slows enemies hit by 30% for 2 seconds.
 * His level 7 talent, "Crippling Talons", increases the slow amount to 50% and the duration to 3 seconds.
 * Sgt. Hammer's ability, "Spider Mines", creates 3 mines that slow enemies hit by 25% for 1.5 seconds.
 * Her level 13 talent, "Tactical Mine Deployment", increases the slow amount to 40%.
 * Stitches' ability, "Slam", slows enemies hit by the inner area by 40% for 1.5 seconds.
 * His level 16 talent, "Pulverize", increases the slow to 75% for 0.75 seconds and allows the outer edge to apply the initial slow.
 * Stukov:
 * "Weighted Pustule" slows enemies hit by 5%, increasing to 50% over 3 seconds.
 * "Bio-Kill Switch" slows enemies affected by "Weighted Pustule" by 70% for 2 seconds.
 * His level 1 talent, "Poppin' Pustules", causes "Bio Kill Switch" to slow enemies near the target affected by "Weighted Pustule" by 70% for 2 seconds.
 * Tassadar
 * His trait, "Resonance Beam", causes his basic attacks to slow enemies by 10%.
 * His level 13 talent, "Feedback", increases the slow to 60% while the target is inside Psionic Storm.
 * "Shock Ray" slows enemies hit by 25% for 2 seconds.
 * Tyrael's ability, "El'Druin's Might", slows enemies hit by 25% for 2.5 seconds.
 * His level 4 talent, "Bound by Law", increases the slow amount to 35% and makes basic attacks against enemies slowed by "El'Druin's Might" increase the duration by 1 second, up to 4 seconds.
 * Varian:
 * "Charge" slows the target by 75% for 1 second.
 * "Lion's Fang" slows enemies hit by 35% for 1.5 seconds.
 * His level 1 talent, "Lion's Maw", increases the slow amount to 50% and the duration to 2 seconds after the quest is completed.
 * Whitemane's ability, "Inquisition", slows the target enemy hero by 30% up to 3 seconds as long as the ability is being channeled.
 * Yrel's ability, "Avenging Wrath", slows enemies hit by 50% for 1 seconds.
 * Her level 13 talent, "Repentance", increases the slow amount to 75% and the duration to 1.5 seconds.
 * Zeratul's ability, "Singularity Spike", slows the first enemy hit by 40% for 3 seconds after a 1 second delay.
 * Zul'jin's ability, "Twin Cleave", slows enemies hit by 15% per axe for 2 seconds.
 * His level 13 talent, "Lacerate", increases the slow amount to 25% per axe.

Heroic Abilities

 * Arthas' level 10 heroic ability, "Summon Sindragosa", slows enemies hit by 60% for 3.5 seconds.
 * His level 20 talent, "Absolute Zero", causes it to slow by 60% for 3.5 seconds after the 2 second root completes.
 * Blaze's level 10 heroic ability, "Combustion", slows enemies hit by 60% for 1 to 5 seconds, depending on how long the ability was channeled.
 * His level 20 talent, "Flash Fire", causes it to slow nearby enemies by 60% while channeling.
 * Chen's level 10 heroic ability, "Storm, Earth, Fire", allows him to use "Earth", slowing enemies hit by 70% for 1.5 seconds.
 * Cho's level 10 heroic ability, "Upheaval", slows enemies hit by 25% for 3 seconds.
 * Chromie's level 8 heroic ability, "Slowing Sands", slows enemies in an area by 10%, stacking up to 70%.
 * D.Va's level 10 heroic ability, "Micro Missiles", slows enemy heroes hit by 35% for 2 seconds.
 * Dehaka's level 10 heroic ability, "Isolation", slows enemy heroes hit by 30% for 3 seconds.
 * Diablo's level 10 heroic ability, "Lightning Breath", slows enemies hit by 5% for 2 seconds, stacking up to 50%.
 * E.T.C.'s level 10 heroic ability, "Stage Dive", slows enemies hit by 50% for 3 seconds.
 * His level 20 talent, "Crowd Pleaser", increases the slow by 30%.
 * Falstad's level 10 heroic ability, "Mighty Gust", slows enemies hit by 40% for 1.5 seconds.
 * Fenix's level 10 heroic ability, "Purification Salvo," deals 50% increased damage to slowed targets.
 * Garrosh's level 10 heroic ability, "Decimate", slows enemies hit by 30% decaying over 4 seconds.
 * Gall's level 10 heroic ability, "Twisting Nether", slows nearby enemies while channeling by 50%.
 * Hogger's level 10 heroic ability, "Hoardapult", slows enemies hit by 50% for 2 seconds.
 * Johanna's level 10 heroic ability, "Falling Sword", slows enemies hit by 50% for 2.5 seconds.
 * Li Li's level 10 heroic ability, "Water Dragon", slows enemies hit by 70% for 4 seconds.
 * Lunara's level 10 heroic ability, "Leaping Strike", slows target enemy by 80% for 0.35 seconds.
 * Mei's level 10 heroic ability, "Ice Wall", slows all enemies trapped inside the wall by 75% for 3 seconds after it expires.
 * Mephisto's level 10 heroic ability, "Consume Souls", slows enemy heroes hit by 40% for 2.5 seconds.
 * Murky's level 10 heroic ability, "March of the Murlocs", slows enemies hit by 15% for 5 seconds for each murloc.
 * Nazeebo's level 10 heroic ability, "Gargantuan", summons a Gargantuan that can be ordered to use "Gargantuan Stomp", slowing enemies hit by 30% for 2 seconds.
 * Probius' level 10 heroic ability, "Null Gate", creates a gate that slows enemies that come to contact with it by 80%. Lasts 4 seconds.
 * Rexxar's level 10 heroic ability, "Unleash the Boars", slows enemies hit by 40% for 5 seconds.
 * Stitches' level 10 heroic ability, "Putrid Bile", emits bile that slows enemies by 35%, lasts 8 seconds.
 * His level 20 talent, "Potent Bile", increases the slow amount to 45% and bile lasts 6 seconds longer.
 * Sylvanas' level 10 heroic ability, "Mind Control", slows the target by 30% for 1.75 seconds.
 * Tassadar's level 10 heroic ability, "Archon", makes his basic attacks slow the target by 30% for 1 second.
 * Thrall's level 10 heroic ability, "Earthquake", summons 3 pulses in an area every 4 seconds that slow enemies by 50%. Each pulse lasts 2 seconds.
 * Tyrande's level 10 heroic ability, "Starfall", slows enemies in an area by 20%, lasts 6 seconds.
 * Xul's level 10 heroic ability, "Skeletal Mages", summons 4 Frost Mages that attack nearby heroes and slow them by 30% for 2 seconds.
 * His level 20 talent, "Cold Hand of Death", increases the slow amount to 50%.

Talents

 * Abathur's level 7 talent, "Vile Nest", adds an additional effect to his "Toxic Nest" ability, slowing enemies hit by 40% for 2.5 seconds.
 * Abathur's level 16 talent, "Envenomed Spikes", adds an additional effect to his "Spike Burst" ability, slowing enemies hit by 40% for 2 seconds.
 * Anub'arak's level 4 talent, "Bed of Barbs", adds an additional effect to his "Impale" ability, creating a bed of spikes that slows enemies by 25%, lasts 3.5 seconds.
 * Alexstrasza's level 16 talent, "Pacify", slows the target by 50% for 3 seconds.
 * Alarak's level 7 talent, "Hindered Motion", adds an additional effect to his "Telekinesis" ability, slowing enemies hit by 25% for 2 seconds.
 * Alarak's level 16 talent, "Mocking Strikes," reduces the cooldown of Alarak's Basic Abilities by 2.5 seconds for each basic attack against slowed enemies.
 * Artanis' level 7 talent, "Warp Sickness", adds an additional effect to his "Phase Prism" ability, slowing enemies hit by 35% for 4 seconds.
 * Arthas' level 13 talent, "Frost Strike", adds an additional effect to his "Frostmourne Hungers" trait, slowing the target by 50% for 1.5 seconds.
 * Auriel's level 4 talent, "Heavy Burden", adds an additional effect to her "Detainment Strike" ability, slowing enemies hit by 40% for 3 seconds once the Stun expires.
 * Azmodan's level 13 talent, "Brutish Vanguard", adds an additional effect to his "Summon Demon Warrior" ability, making Demon Warriors slow nearby enemies by 20%.
 * Azmodan's level 16 talent, "Trample", slows enemies hit by 60% for 1.25 seconds.
 * Azmodan's level 20 talent, "Sin's Grasp", adds an addition effect to his "All Shall Burn" ability, slowing the target by 15% during the channel, and 50% for 2.5 seconds if the channel completes.
 * Blaze's level 7 talent, "Adhesive Petroleum", adds an additional effect to his "Oil Spill" ability, making ignited oil slicks slow enemies hit by 35% for 3 seconds.
 * Blaze's level 20 talent, "Fortified Bunker", adds an additional effect to his "Bunker Drop" heroic, allowing allied heroes to create Oil Slicks that slow enemies every 6 seconds.
 * Brightwing's level 7 talent, "Sticky Flare", adds an additional effect to her "Arcane Flare" ability, slowing enemies hit by 20% for 3 seconds, increased to 40% if they were hit with the center.
 * Cassia's level 7 talent, "Grounding Rod", adds an additional effect to her "Lighting Fury" and "Fend" abilities, slowing enemies hit by 20% for 2 seconds.
 * Chen's level 13 talent, "Pressure Point", adds an additional effect to his "Flying Kick" ability, slowing the target by 40% for 1 second, or 80% if Chen has shields from "Fortifying Brew".
 * Cho's level 7 talent, "Power Surge", adds an additional effect to his "Surging Fist" ability, slowing enemies hit by 30% for 2.5 seconds.
 * Chromie's level 2 talent, "Chronic Conditions", adds an additional effect to her "Time Trap" ability, slowing enemies hit by 30% for 3 seconds once the Time Stop ends.
 * Chromie's level 5 talent, "Mobius Loop", adds an additional effect to her "Dragon's Breath" ability, slowing enemies hit by the center by 60% for 1 second.
 * Deathwing's level 16 talent, "Gaze Unto Destruction", slows enemies hit by "Dragonflight"'s impact by 40% for 4 seconds.
 * Deathwing's level 20 talent, "Stood in the Fire", slows enemies within "Cataclysm's" scorched ground by 40%.
 * Dehaka's level 20 talent, "Essence Claws", adds an additional effect to his "Essence Collection" trait, making his basic attacks slow enemies by 20% for 1 second.
 * Dehaka's level 4 talent, "Lurker Strain", adds an additional effect to his "Burrow" ability, slowing nearby enemies by 30% for 2 seconds when emerging from "Burrow".
 * Dehaka's level 16 talent, "Paralyzing Enzymes", adds an additional effect to his "Drag" ability, slowing the target by 50% for 2 seconds once "Drag" ends.
 * Diablo's level 16 talent, "Debilitating Flames", slows enemies hit by "Fire Stomp" by 5% for 4 seconds, stacking up to 50%.
 * D.Va's level 13 talent, "Target Locked", adds an addition effect to her "Defense Matrix" ability, slowing enemy Heroes that have been in its area for 1.5 seconds by 25% for 3 seconds.
 * E.T.C.'s level 13 talent, "Face Smelt", adds an additional effect to his "Face Melt" ability, slowing enemies hit by 50% decaying over 2 seconds.
 * Fenix's level 4 talent, "Inhibiting Energy", makes his next basic attack in "Phase Bomb" every 10 seconds slow targets by 60%, decaying over 1.5 seconds.
 * Gall's level 16 talent, "Shadowsnare", causes his abilities to slow enemy heroes by 15% for 4 seconds stacking up to 2 times.
 * Garrosh's level 1 talent, "Body Check", slows the target by 30% for 2 seconds, increased to 60% if he is below half health.
 * Garrosh's level 7 talent, "Into the Fray", slows enemies hit by 30% for 2.5 seconds.
 * Gazlowe's level 7 talent, "Master Blaster", causes his "Deth Lazor" and "Xplodium Charge" to slow enemies hit by 35% for 2 seconds. His "Rock-It! Turrets'" Basic Attacks extend the duration.
 * Gul'dan's level 7 talent, "Curse of Exhaustion", adds an additional effect to his "Drain Life" ability, slowing the target by 40% during the channel.
 * Gul'dan's level 20 talent, "Deep Impact", adds an additional effect to his "Rain of Destruction" heroic ability, slowing enemy heroes hit by 90% for 0.5 seconds.
 * Hogger's level 7 talent, "Garbage Fire", slows enemies near his "Loot Hoard" by 20%.
 * Hogger's level 13 talent, "Pummel", adds an additional effect to his "Hogg Wild" ability, slowing enemies hit by 10% for 1.5 seconds, stacking up to 5 times.
 * Junkrat' level 7 talent, "Bogged Down", adds an additional effect to his "Concussion Mine" ability, slowing enemies hit by 40% for 2.5 seconds after landing.
 * Kael'thas' level 13 talent, "Backdraft", adds an additional effect to his "Living Bomb" ability, slowing enemies hit by the explosion by 30% for 2 seconds.
 * Kel'Thuzad's level 4 talent, "Armor of the Archlich", slows nearby enemies by 35% for 4 seconds.
 * Kel'Thuzad's level 7 talent, "Chilling Touch", makes his basic attacks periodically slow enemies by 30% for 2 seconds.
 * Kel'Thuzad's level 13 talent, "Chains of Ice", adds an additional effect to his "Chains of Kel'Thuzad" ability, slowing enemies hit by 60% for 1 second once the Stun expires.
 * Kel'Thuzad's level 20 talent, "Deathchill", adds an additional effect to his "Frost Blast" ability, slowing enemies hit by 40% for 3 second once the Root expires.
 * Li-Ming's level 20 talent, "Temporal Flux", adds an additional effect to her "Disintegrate" heroic ability, gradually slowing enemies hit up to 60%.
 * Lúcio's level 7 talent, "Reverse Amp", slows enemies in the "Crossfade" range by 20% while Lúcio is playing the "Speed Boost" track.
 * Maiev's level 7 talent, "Bonds of Corruption", adds an additional effect to her "Umbral Bind" ability, slowing enemies pulled by 20% for 4 seconds.
 * Maiev's level 20 talent, "Shadow Orb: Shadow Strike", slows target enemy Hero by 30% for 4 seconds.
 * Malfurion's level 13 talent, "Hindering Moonfire", adds an additional effect to his "Moonfire" ability, slowing enemies hit by 25% for 3 seconds.
 * Mal'Ganis' level 13 talent, "The Night Beckons", adds an additional effect to his "Night Rush" ability, slowing enemies hit by 30% for 3 seconds after the Sleep ends.
 * Malthael's level 7 talent, "Cold Hand", adds an additional effect to his "Soul Rip" ability, slowing enemies hit by 20% for 2.5 seconds.
 * Mei's level 13 talent, "Polar Vortex", causes her to slow nearby enemies by 20% after using a basic ability.
 * Mephisto's level 7 talent, "Frost Storm", slows enemy heroes near his "Shade of Mephisto" by 40% for 2 seconds.
 * Muradin's level 7 talent, "Heavy Impact", adds an additional effect to his "Dwarf Toss" ability, slowing enemies hit by 80% for 0.75 seconds.
 * Orphea's level 1 talent, "Ancestral Strength", causes basic attacks that consume Chaos to slow enemies by 20% for 2.5 seconds.
 * Qhira's level 1 talent, "Maximum Effort" adds an addition effect to her "Carnage" ability, slowing enemies by 25% for 2.5 seconds if they're hit with it at least 3 times in one cast.
 * Qhira's level 4 talent, "Ensnaring Swing", causes the primary target of "Revolving Sweep" to be slowed by 30% while the ability is active and other enemies she hits to be slowed by 40% for 3 seconds.
 * Ragnaros' level 4 talent, "Slow Burn", adds an additional effect to his "Blast Wave" ability, slowing enemies hit by 40% for 2 seconds.
 * Ragnaros' level 20 talent, "Flames of Sulfuron", adds an additional effect to his "Sulfuras Smash" heroic ability, slowing enemies hit by 50% for 2 seconds.
 * Raynor's level 1 talent, "Ace in the Hole", adds an additional effect to his "Give ‘Em Some Pepper" trait, slowing enemies hit by 10% for 2.5 seconds.
 * Rexxar's level 16 talent, "Primal Intimidation", slows enemy heroes and summons near Rexxar and Misha by 20% for 2.5 seconds.
 * Stukov's level 1 talent, "Spine Launcher", makes his basic attacks slow enemies by 20% for 1.5 seconds.
 * Sylvanas' level 1 talent, "Overwhelming Affliction", adds an additional effect to her "Banshee's Curse" trait, slowing enemy heroes with 3 stacks by 15%, and also causing her basic attacks against slowed targets to an additional deal 1% of their health as damage.
 * Tassadar's level 4 talent, "Electric Fence", slows enemies near Force Wall by 35%.
 * Thrall's level 16 talent, "Thunderstorm", adds an additional effect to his "Chain Lightning" ability, casting the ability on a hero different than the last hero it was cast on slows enemies hit by 8%, stacking with each cast up to 40%.
 * Tracer's level 1 talent, "Parting Gift", adds an addition effect to her "Recall" ability, dropping six bombs around her that slow enemies by 60% for 0.75 seconds.
 * Tracer's level 10 talent, "Sticky Bomb", adds an additional effect to her "Pulse Bomb" heroic ability, slowing enemies hit by 70% for 3 seconds.
 * Tychus' level 16 talent, "Lead Rain", adds an additional effect to his "Overkill" ability, slowing enemies hit by 20%.
 * Tyrande's level 13 talent, "Harsh Moonlight", adds an additional effect to her "Sentinel" ability, slowing enemies hit by 35% for 4 seconds.
 * Uther's level 13 talent, "Well Met", adds an additional effect to his "Hammer of Justice" ability, slowing the target hero by 25% for 3 seconds.
 * Valeera's level 1 talent, "Crippling Poison", makes her next instance of spell damage slow enemies hit by 25% for 5 seconds.
 * Valla's level 16 talent, "Frost Shot", adds an additional effect to her "Multishot" ability, slowing enemies hit by 25% for 1.5 seconds.
 * Xul's level 1 talent, "Shackler", adds an additional effect to his "Bone Armor" ability, slowing nearby enemies by 35% for 1 second. The cooldown for "Bone Armor" is reduced by 2 seconds when attacking a slowed enemy.
 * Zagara's level 7 talent, "Viscous Acid", adds an additional effect to her "Baneling Barrage" ability, slowing enemies hit by 20% for 1.5 seconds.
 * Zarya's level 16 talent, "Plasma Shock", adds an additional effect to her "Particle Grenade" ability, slowing enemies hit by the center area by 35% for 2 seconds.

Generic Talents

 * "Imposing Presence" and its variants slows nearby enemy heroes and summons.
 * "Nexus Blades" and its variants slow enemies hit with basic attacks.

Non-Heroic Sources

 * Junk Swarm Host's ability, "Slime Pod Poison", slows enemies hit by 50% for 3 seconds.
 * On Alterac Pass, there are Mud Pits that slow units that walk over them by 16% per second, up to 60%.

Counter Abilities

 * Becoming either Unstoppable, Invulnerable or entering Stasis cancels all slow effects and makes the hero immune to slows for their duration.
 * Alexstrasza's trait, "Dragonqueen", reduces the duration of Slows by 50% when in the dragon form.
 * Ana's level 13 talent, "Purifying Darts", adds an additional effect to her "Healing Dart" ability, removing slows from allies hit by it.
 * Arthas' level 7 talent, "Icebound Fortitude", reduces the duration of slows by 75% for 3 seconds.
 * Brightwing's trait, "Soothing Mist", removes slows from nearby allied heroes.
 * D.Va's ability, "Boosters", makes her immune to slows for its duration.
 * Illidan's level 10 heroic ability, "Metamorphosis", removes slows affecting him.
 * Lt. Morales' level 7 talent, "Physical Therapy", adds an additional effect to her "Safeguard" ability, removing slows from the target.
 * Lunara's level 20 talent, "Abolish Magic", removes slows from her and a target ally.
 * Malfurion's level 7 talent, "Nature's Cure", removes slows from allies affected by his "Regrowth" ability.
 * Mei's level 7 talent, "Backup Battery", removes slows affecting her.
 * Sonya's level 4 talent, "Hurricane", adds an additional effect to her "Whirlwind" ability, removing slows affecting her.
 * Sonya's level 10 heroic ability, "Wrath of the Berserker", reduces the duration of slows by 50% while in Berserker form.
 * Stitches' level 20 talent, "Shambling Horror", makes him immune to slows.
 * Yrel's level 4 talent, "Hand of Freedom", removes slows from the targeted allied Hero.
 * Zarya's level 16 talent, "Cleansing Shield", adds an additional effect to her "Shield Ally" ability, removing slows from the targeted ally.
 * Zul'jin's level 4 talent, "Voodoo Shuffle", removes slows affecting him.