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Stun

Stun is a status effect that completely disables a unit. A unit that's stunned cannot attack, move, or use abilities or items. Stuns also interrupt channeling and the animation a unit may be performing. Stuns essentially act as a combination of Silence, Disarm, Immobilize, and Perplex (minus disabling certain abilities that Immobilize does). Most stuns cannot be dispelled by normal means, although certain abilities explicitly remove stuns. Certain stuns cannot be removed nor reduced by Stun Duration Reduction, namely stuns that launch units into the air or uses an affector that constantly applies a stun state.

Sources

State-based

State-based stuns apply a stun status effect directly to the target.

unitItem	Source	Target	Duration	effectType	reducible	Notes
Aluna	Emerald Lightning	Enemy Units	1.25/1.5/1.75/2 seconds	Magic	Yes	Bounces 1 time
Amun-Ra	Path of Destruction	Enemy Units	1 second	Magic	Yes
Andromeda	Comet	Enemy Unit	1.2/1.4/1.6/1.8 seconds	Magic	Yes
Artillery	Homing Missile	Enemy Heroes	Up to 4 seconds	Magic	Yes	Stun duration is 1 second + 0.1 seconds per 100 units the missile traveled
Behemoth	Fissure	Enemy Units	1/1.25/1.5/1.75 seconds	Magic	Yes
Behemoth	Heavyweight	Enemy Units	0.6/0.9/1.2/1.5 seconds	Magic	Yes
Blacksmith	Fireball	Enemy Unit	1.5-2.4 seconds	Magic	Yes	Each Multicast reapplies a 1.5 second stun in 0.3 second intervals
Bombardier	Sticky Bomb	Enemy Units	0.2-3 seconds	Magic	Yes	Stun duration increases by 1 second for every 2 seconds the bomb is primed; Stuns for 0.2 seconds when detonated without priming
Brutalizer	Passive	On Attack	1.4 seconds	Physical	Yes
Bubbles	Kelp Field	Enemy Heroes	0.5 seconds	Magic	Yes	Initial attachment
Bubbles	Kelp Field	Enemy Heroes	1.5/2.25/3 seconds	Magic	Yes	Applies if attached hero moves more than 800 units from the center
Chronos	Curse of Ages	On Attack	1 second	Magic	Yes
Deadwood	Willowmaker	Enemy Unit	1.5 seconds	Physical	Yes
Demented Shaman	Entangle	Enemy Unit	0/0.5/1/1.5 second	Physical	Yes	After initial slow expires
Devourer	Devour	Enemy Unit	3 seconds (Channeling)	Superior Magic	No
Doctor Repulsor	Opposite Charges	Enemy Unit	1/1.5/2/2.5 seconds	Magic	No
Drunken Master	Lunge	Enemy Unit	Up to 1.5 second	Physical	No	Applies while Drunken Master is spinning around the target
Drunken Master	3 Point Strike	Enemy Unit	1/1.5/2 seconds	Physical	No
Electrician	Static Grip	Enemy Unit	2.5/3.25/4/4.75 seconds (Channeling)	Magic	No
Ellonia	Flash Freeze	Enemy Unit	1-3 seconds	Magic	Yes	Duration increases by 0.05 seconds per charge of Frosted consumed
Ellonia	Absolute Zero	Enemy Units	1-3 seconds	Magic	Yes	SotM version only; Duration increases by 0.05 seconds per charge of Frosted consumed
Empath	Essence Link	Enemy Unit	1/1.5/2/2.5 seconds	Magic	Yes	Applies if the link is broken prematurely
Engineer	The Keg	Enemy Units	2 seconds	Magic	Yes
Fayde	Burning Shadows	Enemy Heroes	1.6/1.9/2.2/2.5 seconds	Magic	Yes
Gauntlet	Grapple	Enemy Unit	1/1.2/1.4/1.6 seconds	Physical	Yes
Gauntlet	Gauntlet Blast	Enemy Unit	1.5 seconds	Physical	Yes	Primary target only
Gauntlet	Gauntlet Blast	Enemy Units	1-4 seconds	Magic	Yes	Removed when a unit Consumed by Power takes direct damage after 1 second
Gemini	Twin Fangs	Enemy Units	1.25/1.5/1.75/2 seconds	Magic	Yes
Gunblade	Grappling Shot	Enemy Hero	1 second	Physical	Yes
Gemini Fire	Fire Fang	Enemy Unit	0.5 seconds	Magic	Yes
Geomancer	Dig	Enemy Units	1.5 seconds	Magic	Yes
Geomancer	Crystal Field	Enemy Units	2/3/4 seconds	Superior Magic	Yes	Applies to enemies nearby target after 2.5 seconds; Does not apply to primary target
Gravekeeper	Corpse Toss	Enemy Unit	1 second	Magic	Yes
Hammerstorm	Hammer Throw	Enemy Units	2 seconds	Magic	Yes
Hellbringer	Summon Malphas	Enemy Units	1 second	Superior Magic	Yes
Gemini Ice	Ice Fang	Enemy Unit	0.5 seconds	Magic	Yes
Keeper of the Forest	Root	Enemy Units	1 second	Superior Magic
Kinesis	Stasis Smash	Enemy Unit	Up to 3/3.5/4 seconds	Magic	No	Applies to the primary target while it's in stasis
Kongor	Toss	Enemy Units	2 seconds	Magic	Yes
Kraken	Tsunami Charge	Enemy Hero	1/1.33/1.66/2 seconds	Magic	Yes	Applies if you collide with terrain while holding an enemy hero
Lodestone	Rocket Drill	Enemy Units	1.5 seconds	Magic	Yes	Second activation
Magmus	Lava Surge	Enemy Units	2.15 seconds	Magic	Partial	Initial knockup lasts 0.5 seconds, stunned for 1.65 seconds after landing
Master of Arms	Charged Shot	Enemy Unit	1/1.2/1.4/1.6 seconds	Magic	Yes
Midas	Transmute	Enemy Units	2 seconds	Magic	Yes
Minotaur	Body Slam	Enemy Units	2 seconds (3 on non-hero units)	Magic	Yes
Monkey King	Wan Jin Slam	Enemy Units	0.5 seconds	Magic	No	Hits twice
Moon Queen	Moon Beam	Enemy Unit	0.75 second	Magic	Yes
Moraxus	Quake	Enemy Units	1.75/2/2.25/2.5 seconds	Magic	Yes
Myrmidon	Weed Field	Enemy Units	1/1.33/1.66/2 seconds	Magic	Yes
Myrmidon	Magic Carp	Enemy Unit	1/1.5/2/2.5 seconds	Magic	Yes	If enemy was moving during impact
Nomad	Edge Counter	Enemy Units	2 seconds	Magic	Yes
Nymphora	Nymphora's Zeal	Enemy Units	0.9/1.1/1.3/1.5 seconds	Magic	Yes	Stuns when the projectile is launched and when it returns
Pandamonium	Flick	Enemy Unit	1 second	Physical	No
Pandamonium	Cannon Ball	Enemy Units	1.5/1.75/2/2.25 seconds	Physical	Yes
Pandamonium	Face Smash	Enemy Unit	4.5 seconds (Channeling)	Physical	No
Pearl	Preservation	Enemy Units	1 second	Magic	No
Pebbles	Chuck	Any Unit	1 second	Magic	No	Primary target only
Pebbles	Group Chuck	Any Unit(s)	0.85-1.15 seconds	Magic	No	1st/2nd/3rd thrown unit is airborne for 1/1.15/0.85 seconds
Pestilence	Impale	Enemy Units	1/1.25/1.5/1.75 seconds	Magic	Yes
Pestilence	Gore	On Attack	0.55/0.7/0.85/1 seconds (2 seconds on non-hero units)	Physical	Yes
Pharaoh	Wrath of the Pharaoh	Enemy Unit	0.5 seconds	Superior Magic	No	Applies to enemy unit that was hit by the projectile
Pharaoh	Wrath of the Pharaoh	Enemy Units	1/1.5/2 seconds	Magic	Yes	Applies while being dragged
Pollywog Priest	Tongue Tied	Enemy Unit	2.5/3.25/4/4.75 seconds (Channeling)	Magic	No
Prophet	Persecution	Enemy Unit	Up to 0.75/1/1.25/1.5 seconds	Magic	Yes	Initial hit stuns for 0.5 seconds; Attacking target unit stuns for 0.25 seconds for up to 1/2/3/4 hits
Pyromancer	Dragonfire	Enemy Units	1.6 seconds	Magic	Yes
Rally	Compel	Enemy Units	1.25/1.5/1.75/2 seconds	Magic	Yes
Rampage	Stampede	Enemy Unit	1/1.2/1.4/1.6 seconds	Physical	No	Also pushing the target back over the Stun duration.
Rhapsody	Staccato	Enemy Unit	Up to 1.25/1.5/1.75/2 seconds	Magic	Yes	Initial cast stuns for 1 second; Can be activated 1/2/3/4 times to stun for 0.25 seconds
Riftwalker	Wormhole	Enemy Units	2/2.25/2.5 seconds	Superior Magic	Yes
Silhouette	Sky Dance	Non-NPC Enemy Units	1 second	Magic	Yes
Silhouette	Log Bolas	Non-NPC Enemy Units	1 second	Magic	Yes
Sir Benzington	Joust	Enemy Units	1.25/1.5/1.75/2 seconds	Magic	Yes
Solstice	Blinding Rush	Enemy Units	1.5 seconds	Magic	Partial	Initial knockup lasts 0.45 seconds, stunned for 1.05 seconds after landing
Soul Reaper	Demonic Execution	Non-Boss Enemy Unit	1.5 seconds	Superior Magic	Yes
Stormspirit	Activation	Any Unit	2 seconds	Magic	No	Units is Invulnerable while stunned
Tempest	Glacial Blasts	Enemy Units	0.25/0.5/0.75/1 seconds	Magic	Yes	Impacts a maximum of 3 times; Each impact occurs in 2 second intervals
The Gladiator	Pitfall	Enemy Units	1.5 seconds	Magic	Yes
The Gladiator	Call to Arms	Enemy Units	1 second	Superior Magic	Yes
Torturer	Chain Reaction	Enemy Units	1.25/1.5/1.75/2 seconds	Magic	Yes
Tundra	Avalanche	Enemy Unit	3/3.5/4 seconds	Superior Magic	Yes
Valkyrie	Javelin of Light	Enemy Unit	0.5-5 seconds	Magic	Yes	Minimum duration of 0.5 seconds; Duration increases at a rate of 1 second per 400/350/300/250 units the Javelin travels
Voodoo Jester	Acid Cocktail	Enemy Units	1.2 or 1 second(s)	Magic	Yes	Initial target is stunned for 1.2 seconds; Bounces stun for 1 second
Warchief	Sacred Totems (Shock Totem)	Enemy Unit	1 second	Magic	Yes	Stuns weakest enemy hero within radius for 2 seconds; At Level 4, can stun a second hero after a 2 second delay
Witch Slayer	Graveyard	Enemy Units	1/1.5/2/2.5 seconds	Magic	Partial	Initial knockup lasts 0.5 seconds, stunned for 0.8/1.2/1.6/2 seconds after landing

Affector-based

These stuns are applied as long as the affector that applies the stun persists.

unitItem	Source	Target	Duration	effectType	Notes
Chronos	Chronofield	All Other Units (Enemy Units)	3/4/5 (4/5/6) seconds	Superior Magic
Devourer	Guttling Hook	Any Unit	Varies	Superior Magic	Applies while unit is being pulled back
Kraken	Tsunami Charge	Enemy Hero	Varies	Magic	Applies while an enemy hero is grabbed
Pebbles	Stalagmites	Enemy Units	2 seconds	Magic	Applies a 1.25 second stun in 0.25 second intervals 4 times
Tempest	Elemental Void	Enemy Units	4 seconds (Channeling)	Superior Magic

Mini-stuns

Some stuns last a very short time. While there is no exact requirements for a mini-stun, all stuns that last under 0.5 seconds are listed here. All mini-stuns are reducible and removable.

unitItem	Source	Target	Duration	effectType	Notes
Andromeda	Void Rip	Target Unit	0.05 seconds	Physical
Booboo	Entangling Claws	On Attack	0.1 seconds	Physical
Deadwood	Oakbolt	Enemy Unit	0.1 seconds	Physical
Devourer	Guttling Hook	Enemy Unit	0.1 seconds	Physical	Minimum stun duration if an enemy unit is pulled
Demented Shaman	Entangle	Enemy Unit	0.1 seconds	Physical	On initial cast
Flint Beastwood	Hollowpoint Shells	On Attack	0.05/0.1/0.15/0.2 seconds	Physical
Flint Beastwood	Money Shot	Enemy Unit	0.2 seconds	Superior Magic
Glacius	Ice Imprisonment	Enemy Unit	0.1 seconds	Magic
Monarch	Crippling Pollen	Enemy Unit	0.1 seconds	Magic
Pharaoh	Hellfire	Enemy Unit	0.1 seconds	Magic	Applies to a random enemy unit within radius every 0.75 seconds
Pharaoh	Wall of Mummies	Enemy Unit
Plague Rider	Plague Carrier	Enemy Unit	0.1 seconds	Superior Magic	Initial target only
Savage Mace	Passive	On Attack	0.1 seconds	Physical
Scout	Marksman Shot	Non-Boss Enemy Unit	0.1 seconds	Superior Magic
Skeleton King	The King's Grip	Enemy Unit	0.1 seconds	Physical
Snotter Boss	Charge	Enemy Unit	0.2 seconds	Magic
Swiftblade	Swift Slashes	Enemy Unit	0.1 seconds	Physical	Initial target only
The Chipper	Rocket Barrage	Enemy Unit	0.1 seconds	Magic
Thunderbringer	Blast of Lightning	Enemy Unit	0.1 seconds	Magic
Zephyr	Gust	Enemy Units	0.1 seconds	Magic

Stun Duration Reduction

Sources that reduce stun duration.

heroItem	Source	Target	reduction	Duration	Notes
Armadon	Restless	Self	100%	While charging	SotM activation effect only
Barrier Idol	Passive	N/A	30%	N/A	Does not stack with Shaman's Headdress
Shaman's Headdress	Passive	N/A	15%	N/A	Does not stack with Barrier Idol