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Damage modifiers refer to damage instances that are modified by a percentage or flat value, causing the damage dealt to be increased or decreased. Buffs or debuffs usually affect the damage dealt or taken by a unit, while damaging abilities and spells can modify their damage dealt under certain conditions.
It is important to note that damage modifiers do not add bonus damage but affect all of the damage dealt by an instance. Damage modifiers may also only affect specific damage sub-types (physical, magic, or true).
Buffs or debuffs that modify damage are granted by abilities, items, runes, and summoner spells.
Damage dealt modifier[]
These are buffs that allow the champion that has them to deal increased or decreased magic or physical damage. The raw value from the attack or ability is increased or decreased by the modifier and then applied to the target. All damage modifiers stack multiplicatively.
Increasing damage dealt[]
Champion abilities[]
- and
- and
- , and
- and
Items[]
- / /
Runes[]
Neutral buffs[]
Flat bonus damage[]
While technically not damage modifiers, these abilities are included for completeness.
Champion abilities[]
Items[]
- (Unlike most sources of bonus damage, this is added after damage modifier calculations)
- (Unlike most sources of bonus damage, this is added after damage modifier calculations)
Decreasing damage dealt[]
Champion abilities[]
Summoner Spell[]
Damage received modifier[]
These are buffs or debuffs that allow the champion that have them to receive increased or decreased magic or physical damage from autoattacks, abilities and item's actives. The final value from the attack or ability is increased or decreased by the modifier and then directly applied to the target's health.
Armor and magic resistance damage reduction percentage count as one source of damage received modifier against physical and magical damage respectively. For example, a champion with 300 armor has 75% damage reduction from physical damage.
Damage reduction from armor and magic resistance and from any other sources stack multiplicatively.
Increasing damage received[]
Champion abilities[]
Items[]
Runes[]
Decreasing damage received[]
Champion abilities[]
- (area of effect abilities only)
Items[]
Runes[]
Summoner Spells[]
Neutral buffs[]
Damage immunity[]
There are some instances in the game where a champion is immune to receiving any kind of damage (including true damage) for a few seconds.
Champions[]
- Turrets) (excluding
- (self-cast only)
- Turrets and only invulnerable to damage coming from a specific direction) (excluding
- (only invulnerable to champions a certain distance away)
Items[]
Flat Damage Reduction[]
Several champions have abilities that reduce damage by a flat amount. Some flat damage reductions are factored in after armor or magic resistance. This makes it significantly better the more resistances you have. In addition, periodic damage effects will have each tick of damage reduced. For example,
ticks 8 times, so 1 flat damage reduction would reduce its total damage by 8.Flat damage reduction does not work against true damage.