Stun

Hits against any target can potentially cause a Stun on that target, depending on the damage dealt. Stunning a target interrupts their current action and prevents them from taking actions for a short time. There are two types of Stun:

Light Stuns last a fraction of a second but can be inflicted frequently. Any Hit has a chance to cause a Light Stun. The chance is based on the damage dealt, up to 100% base chance for Hits that deal 100% of the target's maximum Life. Chances lower than 10% are treated as 0%.

Heavy Stuns occur when a target's Stun bar is filled and last multiple seconds. Hits cause Heavy Stun buildup based on the damage dealt. Players and their Minions usually cannot be Heavily Stunned, but players can receive Heavy Stun buildup where specifically mentioned while taking specific actions (such as raising their Shield, Parrying with a Buckler, or riding a mount).

Physical damage, and player (but not monster) Melee Damage, each have 50% more Light Stun chance and Heavy Stun buildup. For players, these bonuses are multiplicative with each other.

A Stun is an on-hit effect that causes the affected target to have their actions interrupted and be unable to act for a short period of time. Stun is separated into two types: Light Stun, which has a chance to briefly interrupt targets based on the damage, and Heavy Stun, which lasts longer and is accumulated on the target.

Mechanics

Light stun

Hits have a chance to stun to apply a Light Stun based on their damage compared to the target's maximum life. The chance to apply Light Stun scales up to 100% chance for hits that deal 100% of the target's maximum life. Any chance below 15% is discarded. Blocked hits still have a chance to Light Stun. Light Stun lasts a fraction of a second.

Players have 50% more Light Stun Threshold per time they were Light Stunned in the past 4 seconds.

Heavy stun

All hits add the target's Heavy Stun threshold, based on the damage of the hit, including blocked hits. An enemy's Heavy Stun threshold can be seen as a bar under their Life bar. Heavy Stun buildup decreases over time if the target has not had any Heavy Stun buildup applied to them for a certain period of time, or rapidly after a Heavy Stun animation finishes.

When a target's Heavy Stun threshold is exceeded, it goes into a longer stun animation; the duration of the heavy stun depends on the specific monster. Heavy Stunned targets are considered to be Immobilised. Heavy Stun buildup cannot occur while the target is Heavy Stunned or while Heavy Stun buildup empties after a Heavy Stun animation finishes. After inflicting a Heavy Stun, it becomes harder to apply more Heavy Stun to the target.

Player minions cannot be Heavy Stunned unless otherwise specified.

Player heavy stun

Players cannot be directly Heavy Stunned unless otherwise specified.

Player Heavy Stun can accumulate while active blocking (Raise Shield and Parry) or riding a mount (Rhoa Mount). Player Heavy Stun lasts 3 seconds. Players cannot evade or block while Heavy Stunned.

Interaction with damage types

Physical damage and melee hits are more effective at applying stun.

For players, both physical damage and melee hits have 50% more chance to apply Light Stun and 50% more Heavy Stun buildup. These bonuses are multiplicative, meaning a physical melee hit is 125% more effective at stunning than damage types of neither.

For monsters, melee attacks have 33% more Light Stun chance and Heavy Stun buildup, and physical damage has 100% more. These bonuses are also multiplicative, meaning monster melee physical hits have 166% more chance to stun than hits of neither.

Stun threshold

Stun threshold modifies the amount of stun buildup needed to inflict a stun. Increasing stun threshold reduces the chance of receiving a light stun and the amount of heavy stun accumulated, and vice versa.

Players have a base Stun Threshold value equal to their maximum life.

Related mechanics

Primed for stun

Primed for Stun is active on targets that have a certain percentage of Heavy Stun built up. Normal enemies are Primed for Stun when they have at least 40% Heavy Stun buildup. Magic enemies are instead Primed at 50% buildup, Rare at 60%, and Unique at 70%.

Crushing blows

Crushing Blows apply a Heavy Stun on enemies Primed for Stun.

Daze

Daze is a debuff that causes hits on the target to apply 50% more Stun Buildup.

Pinned

When a target becomes Pinned, it also receives a Light Stun.

Related gems

Player stun threshold

Related unique items

List of unique items related to stunning

Item	Base item	Item class		Stats
Brynhand's MarkBrynhand's Mark Wooden ClubOne Hand Mace Physical Damage: 6-10 Critical Strike Chance: 5.00% Attacks per Second: 1.45Adds (10-14) to (16-20) Physical Damage +(30-50) to Accuracy Rating +(10-20) to Strength Causes Double Stun BuildupThe mark of the smith was widely known.	Wooden Club	One Hand Mace	1	Adds (10-14) to (16-20) Physical Damage +(30-50) to Accuracy Rating +(10-20) to Strength Causes Double Stun Buildup
Hrimnor's HymnHrimnor's Hymn Oak GreathammerTwo Hand Mace Physical Damage: 14-26 Critical Strike Chance: 5.00% Attacks per Second: 1.05Requires Level 4, 11 StrCauses (30–50)% increased Stun Buildup(80–120)% increased Physical Damage +(10–15) to Strength Gain (10–20) Life per Enemy Killed Slam Skills you use yourself cause Aftershocks"The crack of bone, the spray of blood. Is there sweeter music?" - Hrimnor of the Ezomytes.	Oak Greathammer	Two Hand Mace	4	Causes (30–50)% increased Stun Buildup(80–120)% increased Physical Damage +(10–15) to Strength Gain (10–20) Life per Enemy Killed Slam Skills you use yourself cause Aftershocks
For UtopiaFor Utopia Stone CharmLasts 3.00 Seconds Consumes 20 of 40 Charges on use Cannot be StunnedRequires Level 8Used when you become StunnedDefend with 200% of Armour during effect"It may be centuries hence, but I still hold utmost faith. The Savior will rise, and mankind will be free."Used automatically when condition is met. Can only hold charges while in belt. Refill at Wells or by killing monsters.	Stone Charm	Charm	8	Used when you become StunnedDefend with 200% of Armour during effect
TreefingersTreefingers Riveted MittsArmour: 31Requires Level 11, 19 Str(30-60)% increased Armour Adds (6-10) to (12-16) Physical Damage to Attacks 5% reduced Attack Speed (20-30)% increased Stun Buildup Giant's BloodThe largest beings on Wraeclast are not flesh and blood.	Riveted Mitts	Gloves	11	(30-60)% increased Armour Adds (6-10) to (12-16) Physical Damage to Attacks 5% reduced Attack Speed (20-30)% increased Stun Buildup Giant's Blood
TrephinaTrephina Forge MaulTwo Hand Mace Physical Damage: 29-39 Critical Strike Chance: 5.00% Attacks per Second: 1.05Requires Level 11, 27 StrAdds (12-25) to (22-25) Physical Damage (10–15)% increased Attack Speed Causes (30–50)% increased Stun Buildup Always deals Critical Hits against Heavy Stunned EnemiesThe art of surgery advances one mistake at a time.	Forge Maul	Two Hand Mace	11	Adds (12-25) to (22-25) Physical Damage (10–15)% increased Attack Speed Causes (30–50)% increased Stun Buildup Always deals Critical Hits against Heavy Stunned Enemies
KaltenhaltKaltenhalt Ridged BucklerBuckler Chance to Block: 20% Evasion: 43Requires Level 22, 33 DexGrants Skill: Parry(80–120)% increased Evasion Rating +5% to Maximum Cold Resistance +40% to Cold Resistance Modifiers to Stun Buildup apply to Freeze Buildup instead for Parry 100% of Parry Physical Damage Converted to Cold Damage 25 to 35 Cold Thorns damageCold, miserable and alone... but alive.	Ridged Buckler	Buckler	22	Grants Skill: Parry(80–120)% increased Evasion Rating +5% to Maximum Cold Resistance +40% to Cold Resistance Modifiers to Stun Buildup apply to Freeze Buildup instead for Parry 100% of Parry Physical Damage Converted to Cold Damage 25 to 35 Cold Thorns damage
Nazir's JudgementNazir's Judgement Steelpoint QuarterstaffQuartertaff Physical Damage: 28-51 Critical Strike Chance: 10.00% Attacks per Second: 1.40 Weapon Range: 1.3 metresRequires Level 28, 51 Dex, 22 IntAdds (30-36) to (75-81) Physical Damage +(50–100) to Accuracy Rating (10–20)% increased Stun Duration Daze on Hit (30-50)% increased Melee Damage against Stunned EnemiesThe first witch hunter knew one critical tactic: never let your enemy have a clear moment.	Steelpoint Quarterstaff	Quarterstaff	28	Adds (30-36) to (75-81) Physical Damage +(50–100) to Accuracy Rating (10–20)% increased Stun Duration Daze on Hit (30-50)% increased Melee Damage against Stunned Enemies
Obern's BastionObern's Bastion Stacked SabatonsArmour: 56 Evasion: 50Requires Level 33, 32 Str, 32 Dex(150–200)% increased Armour and Evasion (20–25) Life Regeneration per second 200% increased Stun Recovery (30–50)% reduced Chill Duration on you (30–50)% reduced Freeze Duration on you (30–50)% reduced Shock duration on youThe storm cannot sway those of sure footing.	Stacked Sabatons	Boots	33	(150–200)% increased Armour and Evasion (20–25) Life Regeneration per second 200% increased Stun Recovery (30–50)% reduced Chill Duration on you (30–50)% reduced Freeze Duration on you (30–50)% reduced Shock duration on you
Eye of ChayulaEye of Chayula Gold AmuletRequires Level 35(12-20) to increased Rarity of items found(20-30)% reduced maximum Life +(10-15) to all Attributes Cannot be Light StunnedNever blinking, always watching.	Gold Amulet	Amulet	35	(12-20) to increased Rarity of items found(20-30)% reduced maximum Life +(10-15) to all Attributes Cannot be Light Stunned
TidebreakerTidebreaker Pointed MaulTwo Hand Mace Physical Damage: 68-102 Critical Strike Chance: 6.50% Attacks per Second: 1.10Requires Level 45, 104 Str(120–150)% increased Physical Damage +(2–3) to Level of all Melee Skills +(20–30) to Intelligence Causes (150–200)% increased Stun Buildup All Damage from Hits with this Weapon Contributes to Chill MagnitudeThe sea strikes the rock relentlessly. Whether in one day or in ten thousand years, eventually the rock will crumble, and the Brine King's domain will grow.	Pointed Maul	Two Hand Mace	45	(120–150)% increased Physical Damage +(2–3) to Level of all Melee Skills +(20–30) to Intelligence Causes (150–200)% increased Stun Buildup All Damage from Hits with this Weapon Contributes to Chill Magnitude
Prized PainPrized Pain Iron RingRequires Level 48Adds 1 to 4 Physical Damage to Attacks+(20–30) to Strength Skills gain a Base Life Cost equal to 10% of Base Mana Cost Deal your Thorns Damage to Enemies you Stun with Melee Attacks (24–35) to (35–53) Physical Thorns damageAgony brings clarity to those of pure mind.	Iron Ring	Ring	48	Adds 1 to 4 Physical Damage to Attacks+(20–30) to Strength Skills gain a Base Life Cost equal to 10% of Base Mana Cost Deal your Thorns Damage to Enemies you Stun with Melee Attacks (24–35) to (35–53) Physical Thorns damage
Marohi ErqiMarohi Erqi Totemic GreatclubTwo Hand Mace Physical Damage: 73-99 Critical Strike Chance: 5.00% Attacks per Second: 1.10 Weapon Range: 1.3 metresRequires Level 60, 89 StrCrushes enemies on hit+150 Strength Requirement (600-700)% increased Physical Damage (-300--200) to Accuracy Rating 35% reduced Attack Speed (40-60)% increased Stun Duration Heavy Stuns Enemies that are on Full Life"Drunken Erqi boasted to Tukohama; the God of War challenged him to a clash of strength. Woe to the Divine - he should have made it a test of skill!"	Totemic Greatclub	Two Hand Mace	60	Crushes enemies on hit+150 Strength Requirement (600-700)% increased Physical Damage (-300--200) to Accuracy Rating 35% reduced Attack Speed (40-60)% increased Stun Duration Heavy Stuns Enemies that are on Full Life

Related to stun threshold

List of unique items related to stun threshold

Version history

Version	Changes
0.3.0	Light stun chances of less than 15% are now treated as 0% (previously described as less than 10%, but actually less than 20% for monsters being stunned and less than 12% for players being stunned). Clarified on the Stun Keyword that Monster Melee Damage has 33% more Light Stun chance and Heavy Stun buildup, and Monster Physical Damage has 100% more Light Stun chance and Heavy Stun buildup. These bonuses are multiplicative with each other. Note this is purely a description change. Fixed a bug where the multipliers to Stun Buildup for physical damage and melee damage were additive with Stun Buildup multipliers instead of multiplicative.
0.2.0f	Moderately reduced the capacity for monsters to Light Stun you especially towards Cruel and Endgame by lowering the amount of Stun-Damage they deal, and increasing the minimum they must deal to Light Stun you. Additionally, Elemental, Chaos and Ranged stun-damage has been penalised even further so you're less likely to get stunned by random stray projectiles and other things of the sort. These changes don't affect Light Stuns dealt by players.
0.2.0e	The Jewel Modifier for additional Stun Threshold based on your maximum Energy Shield now rolls 5-15% (previously 5-10%). Existing items can be improved to the new ranges by using a Divine Orb. The Time-lost Jewel Modifier for additional Stun Threshold based on your maximum Energy Shield now rolls 1-2% (previously 1%). Existing items can be improved to the new ranges by using a Divine Orb.
0.2.0	Unified stun mechanics and terminology between players and monsters. The "stagger" that players suffer when blocking too much damage with their shield raised is now a heavy stun. Players are still unable to be heavy stunned unless a mechanic specifically states otherwise. Players can no longer be light stunned while their shield is raised. Players have 50% more Light Stun Threshold per time stunned in past 4 seconds (previously 25% more player Light Stun Threshold per time stunned in past 6 seconds). Your Heavy Stun bar now doesn't start emptying until the Heavy Stun animation has finished (instead of when the Heavy Stun animation starts). Heavy Stun duration on players is now 3 seconds (previously 1 second). Players cannot Block or Evade Hits while they are Heavy Stunned. Monsters now have higher Light Stun damage scaling with level. In the very early parts of the campaign there is no change, scaling to around twice as much light stun damage in the endgame. Magic enemies are now Primed for Stun when they have at least 50% Heavy Stun buildup, Rare at 60%, and Unique at 70% (previously 60%, 70%, and 80% respectively).
0.1.0	Introduced to the game.