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On-Action Effects

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On-action effects is a catch-all term for additional effects of a champion's actions as caused by an item, ability, or passive of a champion. Actions in this case include Standard Champion Auto-Attacks; Improved Auto-Attacks which will still occur even if the attack is dodged or blocked, or the attacker is blinded; non-basic attack damage from pets; basic attacks from pets; taking damage from a player, minion, monster, or pet; and champion abilities. Actions will always trigger as many on-action effects as are applicable and from this fact a split into four rough categories, each with a principle example, can be made with On-strike effects including on-hit effects, on-spell effects including spell effects, ability modifiers including critical strikes, and triggers including on-damage-taken effects (defensive triggers).

On-Strike Effects

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On-Hit Effects

On-hit effects are effects that trigger on a champion's basic attacks and a select few abilities. An autoattack or ability that applies on-hit effects can apply any number of these effects at once.

There are some pet than can apply on-hit effect. For example: Shaco Shaco's Hallucinate.png Hallucinate or LeBlanc LeBlanc's Mirror Image.png Mirror Image.

For more information, click here.

Champion Abilities

Physical Damage

The damage dealt by these effects will apply life steal unless otherwise stated.

Non-Physical Damage

These abilities will not incur any healing. In all cases, the triggering attack will still apply life steal.

Damage Over Time

These abilities will not incur any healing. In all cases, the triggering attack will apply life steal.

Splash Damage

For the full article, see area of effect.

The damage dealt to enemies other than the original target will not trigger on-hit effects or spell-effects. If the attack misses or is blocked, the effect will not trigger.

Non-Damaging

The following abilities have a non-damaging on-hit effect component:

Exceptions

The following "on-hit effects" are classified as abilities and will trigger spell effects, rather than on-hit effects. It is unknown of this behaviour is an oversight or intentional as they are visually identical to the on-hit effects of other champions. The triggering attack will still trigger on-hit effects.

Misnomers

Pets

Pets have a complicated relationship with on-hit effects and spell effects. For the full article, see champion summoned units.
  • Any damage dealt by a pet that isn't its basic attacks will apply spell effects.
  • If its basic attacks deal damage based on its AD (regardless of whether the damage is physical or magical), it will trigger any on-hit effects that it is in possession of. It will not trigger the on-hit effects of its owner and it will not trigger spell effects at all.
  • If its basic attacks deal damage based on its AP (regardless of whether the damage is physical or magical), it will trigger its owner's spell effects. It will not trigger on-hit effects (its own or its owner's).
  • Shaco Shaco's Jack in the Box.png Jack In The Box is the only exception, although this is likely due to how old the champion is. The box's attacks will trigger spell effects, and despite having attack damage it deals damage based on an unseen statistic.

On-Attack Effects/Auto-attack Modifiers

The following effects occur when your champion attacks or modifies your champion's basic attacks to behave differently. These effects are not triggered "on-hit", and will still occur even if the attack is dodged or blocked, or the attacker is blinded. On-attack effects consistently apply spell effects unless stated otherwise, with one exception.

Applies spell effects
Note that the triggering attack still applies on-hit effects as normal, except where stated.
Applies on-hit effects
Note that while these effects will still occur while blinded; blind, block, dodge and parry will still interact with the damage dealt.
Applies neither

Items

On-Hit Effects

  • The Black Cleaver item.png The Black Cleaver: Dealing physical damage to an enemy champion reduces their armor by 5% for 4 seconds. This effect stacks up to 5 times.
  • Blade of the Ruined King item.png Blade of the Ruined King: Unique passive: Your attacks deal 8% of the target's current health in physical damage (60 max vs. minions and monsters).
  • Entropy item.png Entropy: UNIQUE Passive - Rage: basic attacks grant 20 movement speed for 2 seconds on hit. Minion, monster, and champion kills grant 60 movement speed for 2 seconds
  • Executioner's Calling item.png Executioner's Calling: Unique passive: On hit, target suffers Grievous Wounds for 1.5 seconds.
  • Feral Flare item.png Feral Flare: Unique passive - Maim: Basic attacks on hit deal 25 (+1 per Feral stack) bonus magic damage and restore 10 health. Minions and monsters take triple the bonus magic damage.
  • Frozen Mallet item.png Frozen Mallet: Unique passive: On hit, target is slowed by 40% (30% if ranged attack) for 1.5 seconds.
  • Furor item.png Furor: Unique - Furor: Whenever you deal damage with a single target attack or spell, you gain 12% movement speed that decays over 2 seconds.
  • Grez's Spectral Lantern item.png Grez's Spectral Lantern: Unique: Your basic attacks against minions and monsters have a 20% chance to deal 200 bonus magic damage.
  • Hextech Gunblade item.png Hextech Gunblade: Unique - Reload: Your basic attacks and single target spells against champions reduce the cooldown of this item by 3 seconds.
  • The Lightbringer item.png The Lightbringer: Unique - Vanquish: Basic attacks have a 20% chance to deal 100 bonus magic damage. Effect doubled for non-champions.
  • Madred's Razors item.png Madred's Razors: Unique - Maim: Your basic attacks against monsters deal 50 bonus magic damage and restore 8 health on hit.
  • Muramana item.png Muramana: Toggle: Single target spells and attacks (on hit) consume 3% of current Mana to deal bonus physical damage equal to twice the amount of Mana consumed.
  • Nashor's Tooth item.png Nashor's Tooth: Unique: Basic attacks deal 15 (+15% AP) bonus magic damage on hit.
  • Phage item.png Phage: Unique Passive - Rage: Basic attacks grant 20 movement speed for 2 seconds on hit. Minion, monster, and champion kills grant 60 movement speed for 2 seconds. The movement speed bonus is halved for ranged champions.
  • Ravenous Hydra item.png Ravenous Hydra: Unique – Cleave (Melee only): Your attacks deal physical damage up to 60% of your Attack Damage to units around your target, decaying down to 20% near the edge.
  • Sanguine Blade item.png Sanguine Blade: Unique passive: On hit, you gain +6 attack damage and +1% life steal for 4 seconds (maximum 5 stacks).
  • Spirit of the Elder Lizard item.png Spirit of the Elder Lizard: Unique - Incinerate: Deals an additional 14 + (2 × level) bonus true damage over 3 seconds upon dealing physical damage.
  • Tiamat item.png Tiamat: Unique – Cleave (Melee only): Your attacks deal physical damage up to 60% of your Attack Damage to units around your target, decaying down to 20% near the edge.
  • Trinity Force item.png Trinity Force: Unique Passive - Rage: Basic attacks grant 20 movement speed for 2 seconds on hit. Minion, monster, and champion kills grant 60 movement speed for 2 seconds. The movement speed bonus is halved for ranged champions.
  • Wit's End item.png Wit's End: Unique: On-hit, you deal 42 magic damage and steal 5 magic resistance from your target (stacking up to 5 times).
  • Wriggle's Lantern item.png Wriggle's Lantern: Unique Passive - Maim: Basic attacks against monsters deal 75 bonus magic damage and restore 10 health on hit.

A few items have on-hit effects that require being activated:

  • Entropy item.png Entropy: Unique: For 5 seconds, your attacks reduce your target's movement speed by 30% and deal 80 true damage over 2.5 seconds - (60 second cooldown). (the activation of Entropy counts as casting an ability, and so will trigger effects like Sheen item.png Sheen)
  • Iceborn Gauntlet item.png Iceborn Gauntlet: Unique Passive - Spellblade: After using an ability, your next basic attack deals bonus physical damage equal to 125% of your base attack damage to surrounding enemies and creates a field for 2 seconds that slows enemies inside by 30% - (2 second cooldown).
  • Lich Bane item.png Lich Bane: Unique – Spellblade: After using an ability, your next basic attack deals 75% base AD (+ 50% AP) bonus magic damage - (2 second cooldown).
  • Sheen item.png Sheen: Unique Passive - Spellblade: After using an ability, your next basic attack deals 100% base AD bonus physical damage - (2 second cooldown).
  • Statikk Shiv item.png Statikk Shiv: Unique Passive - Moving and attacking builds Static Charges. At 100 charges, your next attack expends the charges to deal 100 magic damage to up to 4 targets. This damage can critically strike.
  • Trinity Force item.png Trinity Force: Unique Passive - Spellblade: After using an ability, your next basic attack deals 200% base AD bonus physical damage - (2 second cooldown).

On-Attack Effects

The following effects occur when your champion attacks, rather than when the attack hits. They will trigger even if the attack is blocked or dodged, or if the attacker is blinded.

  • Guinsoo's Rageblade item.png Guinsoo's Rageblade: Passive: Your basic attacks or spellcasts grant you 4% attack speed and 4 ability power for 8 seconds. This bonus stacks up to 8 times.
  • Manamune item.png Manamune: Unique - Mana Charge: Grants +4 / 8 maximum mana (max. +750 mana) for each basic attack, spell cast, and mana expenditure (occurs up to 2 times every 8 / 6 seconds).

Transforms into Muramana item.png Muramana at +750 mana.

  • Runaan's Hurricane item.png Runaan's Hurricane: Unique: On-attack you fire minor bolts at 2 nearby targets, each dealing 10 + 50% of your attack damage and applying on-hit effects.
  • Wit's End item.png Wit's End: Unique: On-attack you steal 5 magic resistance from the target for 5 seconds, stacking up to 5 times.

Lifesteal

Life steal is an offensive stat that converts a percentage of the physical damage dealt by a champion's basic attack or ability that applies on-hit effects to health regained. For the main article, see life steal.

Life steal applies to all physical damage dealt on-hit, including any sourced from on-hit effects (with a few exceptions). Sheen item.png Sheen and Nasus Nasus' Siphoning Strike.png Siphoning Strike is a renowned example of powerful sustain as life steal not only applies to the basic damage on the attack, but the bonus damage on Sheen and the stacked damage on Siphoning Strike.

Life steal is calculated from the actual damage done to an enemy after armor and all other forms of damage reduction. Almost all champions have 0% base life steal. It can be increased with items, runes, masteries, and some champion abilities.

Damage dealt to enemies beyond your target through splash damage will not apply life steal. That is unless the damaging effect specifically states that on-hit effects will apply to all enemies damaged (such as Ravenous Hydra item.png Ravenous Hydra and Rat-Ta-Tat-Tat.png Rat-Ta-Tat-Tat).

On-Spell Effects

Spell Effects

Spell effects are effects that trigger on a champion's damaging abilities. They apply to all damaging abilities, with the exception of on-hit effects or abilities that specify that they apply on-hit effects.  Abilities can apply any number of spell effects at once.

Additionally, spell effects will apply other spell effects - creating synergy between effects such as Liandry's Torment item.png Liandry's Torment and Rylai's Crystal Scepter item.png Rylai's Crystal Scepter. In the case of spell effects such as Liandry's Torment item.png Liandry's Torment: a spell effect will not trigger itself. 

Champion Abilities

On-Hit Effects

The following "on-hit effects" are incorrectly, although possibly intentionally classified as abilities and will trigger spell effects. The triggering attack can still trigger on-hit effects.

Kassadin Kassadin's Nether Blade.png Nether Blade is the only one of these skills that states in its description that it behaves differently.

Pets

For the full article, see champion summoned units.

Pets have a complicated relationship with on-hit effects and spell effects.

  • Any damage dealt by a pet that isn't its basic attacks will apply spell effects.
  • If its basic attacks deal damage based on its AD (regardless of whether the damage is physical or magical), it will trigger any on-hit effects that it is in possession of. It will not trigger the on-hit effects of its owner and it will not trigger spell effects at all.
  • If its basic attacks deal damage based on its AP (regardless of wether the damage is physical or magical), it will trigger its owner's spell effects. It will not trigger on-hit effects, neither its own or its owner's.

Shaco Shaco's Jack in the Box.png Jack In The Box is the only exception, although this is likely due to how old the champion is. The box's attacks will trigger spell effects, and despite having attack damage it deals damage based on an unseen statistic.

Items

Applying Spell Effects

The following activated damaging items will apply spell effects sourced from items (they will not apply champion-specific spell effects):

  • Blackfire Torch item.png Blackfire Torch: Unique: Deals 20% of target champion's maximum Health in magic damage over 4 seconds and increases all subsequent magic damage taken by target by 20% - (60 second cooldown)
  • Bilgewater Cutlass item.png Bilgewater Cutlass: Unique Active - Deals 100 magic damage and slows the target enemy champion's movement speed by 25% for 2 seconds - (90 second cooldown). 500-range.
  • Blade of the Ruined King item.png Blade of the Ruined King: Unique Active - Drains target champion, dealing 15% of the champion's maximum Health in physical damage and healing you for the damage dealt. Additionally you steal 30% of their movement speed for 4 seconds - (60 second cooldown). 500-range
  • Deathfire Grasp item.png Deathfire Grasp: Unique: Deals 15% of target champion's maximum health in magic damage and applies the debuff, Doom.
  • Hextech Gunblade item.png Hextech Gunblade: Unique Active: Deals 150 (+ 40% AP) magic damage and slows the target champion's movement speed by 40% for 2 seconds - (60 second cooldown). 700-range.

On Ability Effects

The following effects occur when your champion's ability deals damage, rather than when the ability is casted. They won't trigger if the ability is blocked or you miss the ability.

  • Deathfire Grasp item.png Deathfire Grasp: Unique - Doom: Amplifies all magic damage that champion takes by 20% for 4 seconds - (60 second cooldown). 750-range.
  • Furor item.png Furor: Unique - Furor: Whenever you deal damage with an attack or single-target spell, you gain 12% movement speed that decays over 2 seconds.
  • Liandry's Torment item.png Liandry's Torment: Unique Passive: Dealing spell damage applies a damage-over-time effect that deals bonus magic damage equal to 2% of the target's current Health per second. This bonus damage is doubled against movement-impaired units and capped at 100 damage per second vs. monsters.
  • Morellonomicon item.png Morellonomicon: Unique - Passive: Dealing magic damage to an enemy champion below 40% health inflicts Grievous Wounds to them for 4 seconds.
  • Muramana item.png Muramana: Active - Toggle: Autoattacks and Single-Targeted spells consume 3% of current Mana to deal bonus physical damage equal to twice the amount of Mana consumed.
  • Rylai's Crystal Scepter item.png Rylai's Crystal Scepter: Your spell damage will slow the target by 35% for 1.5 seconds (15% for multi-target spells, damage-over-time spells and spells with a cooldown time below 3 seconds).

On-Cast Effects

On-Cast Effects

The following effects occur when your champion casts an ability, rather than when the ability deals damage. They will trigger even if the ability is blocked or you miss the ability.

  • Archangel's Staff item.png Archangel's Staff: Unique - Mana Charge: Each time you cast a spell or spend mana, your maximum mana increases by 4 (3 second cooldown). Bonus caps at +750 bonus mana.
  • Guinsoo's Rageblade item.png Guinsoo's Rageblade: Passive: Your basic attacks or spellcasts grant you 4% attack speed and 4 ability power for 8 seconds. This bonus stacks up to 8 times.
  • Manamune item.png Manamune: Unique - Mana Charge: Each time you attack, cast a spell or spend mana, your maximum mana increases by 4 (3 second cooldown). Bonus caps at +750 bonus mana.
  • Tear of the Goddess item.png Tear of the Goddess: Unique - Mana Charge: Each time you attack, cast a spell or spend mana, your maximum mana increases by 4 (3 second cooldown). Bonus caps at +750 bonus mana.

On-Cast Effects

The following effects occur when your champion casts an ability, rather than when the ability deals damage. These effects will occur even on damageless abilities, if the ability is blocks, or if the ability misses.

Spell Vamp

Rylai's?

Ability Modifiers

Attack Modifiers

  • The Black Cleaver item.png The Black Cleaver applies to all physical damage sourced from the holder, including on-hit effects.
  • Morellonomicon item.png Morellonomicon applies to all magical damage sourced from the holder, including on-hit effects.

Spell Modifiers

Karma's Mantra, Heimerdinger's Ult, etc.

Critical Strikes

Critical strike is not considered an on-hit effect. A few select abilities can critically strike (Alpha Strike.png Alpha Strike, Steel Tempest.png Steel Tempest, Parrrley.png Parrrley and Judgment.png Judgment), but this should not be mistaken for standard functionality.

In almost all cases, the attack that triggers an on-hit effects may still critically strike and apply life steal. Also in most cases, critically striking will not affect the damage of the on-hit effect, unless explicitly said otherwise, such as Statikk Shiv item.png Statikk Shiv. A critical strike is a modifier that causes an auto-attack or ability to deal a flat multiple of its normal damage. This could represent an attack that hits harder, a lucky strike or damaging a weak area on an opponent.

Players can increase the chance and the damage of critical strikes with items, abilities, and runes.

It only applies to basic attacks or certain abilities like Gangplank Gangplank's Parrrley.png Parrrley and Yasuo Yasuo's Steel Tempest.png Steel Tempest that act like a basic attack or Garen Garen's Judgment.png Judgment and Master Yi Master Yi's Alpha Strike.png Alpha Strike,which are specially stated.

It's important to note that you cannot score a critical strike against a building such as a turret or inhibitor.

Chance

Critical strike chance is the chance of a champion's physical attacks dealing a critical strike. Critical strike chance stacks additively. Runes, items, and all abilities can increase critical strike chance.

When averaged over a large number of autoattacks and at base critical damage, critical strike chance is essentially a damage multiplier where each % of crit chance adds 1% damage. Thus at 50% critical strike chance a champion will be doing (on average) 150% damage with autoattacks, not counting critical strike damage. Because of this, critical strike chance scales well with both attack damage and attack speed. The formula for this damage multiplier is given by:

% Damage multiplier = %Crit chance x (%Crit Damage - 100%) + 100%

The maximum critical strike chance you can reach at level 1 through masteries is 20.25%, excluding abilities and items.

Critical strike chance has a hard cap at 100%.

Critical strike chance has a theoretical gold value of 50 gold per 1% critical strike chance. This makes Cloak of Agility the most efficient core item for critical strike chance, as it grants 15% critical chance for the cost of 730 gold with a 48.6 gold per % crit chance efficiency.

Damage

Critical strike damage refers to the amount of damage that a champion's critical strike will deal. All champions have 200% critical strike damage by default.

Skills affected by Critical Chance

Certain skills are capable of Critical Strikes and/or are affected by Critical Chance

  • Others
    • Caitlyn Caitlyn's Headshot.png Headshot: Critical strikes do bonus (125%AD  × Critical strike damage  − 150%) against champions or (175%AD  × Critical strike damage  − 250%) against minions and monsters.
    • Gangplank Gangplank's Parrrley.png Parrrley: Critical strikes do bonus entire damage  × (Critical strike damage  − 100%).
    • Garen Garen's Judgment.png Judgment: Critical strikes do bonus AD ratio damage portion  × (Critical strike damage  − 150%).
    • Jayce Jayce's Hyper Charge.png Hyper Charge: Critical strikes do bonus entire damage  × (Critical strike damage  − 100%).
    • Lucian Lucian's Lightslinger.png Lightslinger: The additional shot does bonus 50%AD × (Critical strike damage  − 100%) if it is a critical strike.
    • Master Yi Master Yi's Double Strike.png Double Strike: The additional strike does bonus 50%AD × (Critical strike damage  − 100%) if it is a critical strike.
      • Alpha Strike.png Alpha Strike: Critical strikes do bonus 60%AD  × (Critical strike damage  − 100%).
    • Nasus Nasus' Siphoning Strike.png Siphoning Strike: Critical strikes do bonus base damage  × (Critical strike damage  − 100%).
    • Viktor Viktor's Siphon Power.png Siphon Power*: Magic damage, benifiting from Life steal. Critical strikes do bonus entire damage  × (Critical strike damage  − 100%).
    • Yasuo Yasuo's Steel Tempest.png Steel Tempest: Critical strikes do bonus (75%AD  × Critical strike damage  − 100%).
  • Additions
    • Shaco Shaco's Backstab.png Backstab: Critical strikes do Damage bonus increases damage after critical modifier.
    • Talon Talon's Mercy.png Mercy: Critical strikes do Damage bonus increases damage after critical modifier.
    • Tryndamere Tryndamere's Spinning Slash.png Spinning Slash: Cooldown is reduced by 1 second for every critical strike. This effect is doubled against champions.
  • Affected by Critical strike damage
    • Shaco Shaco's Deceive.png Deceive: Causes next auto-attack during the next 6 seconds to deal increased damage, which is described as a "Critical Strike".
    • Pantheon Pantheon's Spear Shot.png Spear Shot: Will crit for a +100% damage bonus due to the passive from Certain Death.png Certain Death if the target is under 15% health.
  • Unaffected by Critical strike damage
    • Anivia Anivia's Frostbite.png Frostbite: The 2x damage modifier applied by being chilled by Flash Frost.png Flash Frost is given out as critical strike.
    • Gnar Gnar's GNAR!.png GNAR!: The damage is given out as critical strike when enemy hits terrain.
    • Gragas Gragas' Barrel Roll.png Barrel Roll: The damage is given out as critical strike when the cask ferments after 2 seconds.
    • Karthus Karthus' Lay Waste.png Lay Waste: Appears like a critical strike when acting like a single target spell (hitting only one enemy).
    • Soraka Soraka's Starcall.png Starcall: The damage is given out as critical strike when enemy stands in the center.
    • Vayne Vayne's Condemn.png Condemn: The double-damage proc'd by being knocked into a wall is given out as critical strike.

Triggers

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Enemy Triggers

On Being Hit

The following effects can occur when you are hit by a damaging ability:

  • Banshee's Veil item.png Banshee's Veil: Unique - Grants a spell shield that blocks the next enemy ability. This shield refreshes after no damage is taken from enemy champions for 25 seconds.
  • Hexdrinker item.png Hexdrinker: Unique - Lifeline: Upon taking magic damage that would reduce health below 30%, grants a shield that absorbs 250 magic damage for 5 seconds - (90 second cooldown).
  • Maw of Malmortius item.png Maw of Malmortius: Unique - Lifeline: Upon taking magic damage that would reduce health below 30%, grants a shield that absorbs 400 magic damage for 5 seconds - (90 second cooldown).
On Being Hit

A few other items trigger an effect on being hit by an enemy champion instead:

  • Doran's Shield item.png Doran's Shield: Unique Passive: Blocks 8 damage from champion basic attacks.
  • Hexdrinker item.png Hexdrinker: Unique - Lifeline: Upon taking magic damage that would reduce health below 30%, grants a shield that absorbs 250 magic damage for 5 seconds - (90 second cooldown).
  • Maw of Malmortius item.png Maw of Malmortius: Unique - Lifeline: Upon taking magic damage that would reduce health below 30%, grants a shield that absorbs 400 magic damage for 5 seconds - (90 second cooldown).
  • Ninja Tabi item.png Ninja Tabi: Unique Passive: Blocks 10% of the damage from basic attacks.
  • Quill Coat item.png Quill Coat: Unique - Sapping Barbs: You gain 40 HP/5 and 30 MP/5 for 5 seconds whenever you take damage from a monster. Additionally, monsters who attack you bleed for 5% of their maximum health over 3 seconds (maximum 150 damage). Sapping Barbs cannot deal lethal damage.
  • Randuin's Omen item.png Randuin's Omen: Unique Passive – Cold Steel: If you are hit by a basic attack, you slow the attacker's attack speed by 10%.
  • Spirit of the Ancient Golem item.png Spirit of the Ancient Golem: Unique - Sapping Barbs: You gain 60 HP/5 and 45 MP/5 for 5 seconds whenever you take damage from a monster. Additionally, monsters who attack you bleed for 5% of their maximum health over 3 seconds (maximum 150 damage). Sapping Barbs cannot deal lethal damage.
  • Thornmail item.png Thornmail: Unique Passive: On being hit, returns 30% of damage, before any reductions such as armor, as magic damage.
  • Warden's Mail item.png Warden's Mail: Unique – Cold Steel: If you are hit by a basic attack, you slow the attacker's attack speed by 15% for 1 seconds.
On Being Hit

The following abilities occur on being hit by an on-hit source:

Personal Triggers

The foollowing effects are abilities that can be detonated on-hit. Regardless of how they are detonated, they will trigger spell effects.

Ally Triggers

The following effects are abilities that can be detonated on-hit. Regardless of how they are detonated, they will trigger spell effects.

  • Braum's Passive (need to make this mark-up!)
  • Leona Leona's Sunlight.png Sunlight (applies the ally's on-ability effects, not Leona's)

Single-Target Effects

Certain effects can apply to any single target action against an enemy, possibly requiring damage. This includes furor boots enchantment, triforce and phage passives, and a few others.

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