Damage modifiers refer to the buffs or debuffs applied to a unit that causes it to deal or receive increased or decreased damage. These are percentage values. They don't add extra flat damage but modify all damage normally done. These buffs or debuffs are only received by champion abilities, neutral buffs, on-hit effects from items and runes.

Damage dealt modifier

These are buffs that allow the champion that has them to deal increased or decreased magic or physical damage from basic attacks, abilities, and item actives. The raw value from the attack or ability is increased or decreased by the modifier and then applied to the target.

All damage dealt modifiers stack multiplicatively. Since multiplication is commutative, the order is irrelevant. Example: If SwainSquare Swain uses Torment Torment while affected by SonaSquare Sona's Aria of Perseverance Aria of Perseverance, his damage to the afflicted target will be modified by 90% (120% × 75%).

Increasing damage dealt

Champion abilities

Note: Only the damage modifier effect of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.

Runes

Flat bonus damage

While technically not damage modifiers, these abilities are included for completeness.

General

  • Basic attacks against lane minions deal 5 bonus damage.

Champion abilities

  • AsheSquare Ashe's Ranger's Focus Ranger's Focus causes her autoattacks to deal 115 / 120 / 125 / 130 / 135% AD total physical damage over 5 shots.
  • GangplankSquare Gangplank's Powder Keg Powder Keg deals 60 / 90 / 120 / 150 / 180 bonus damage to champions.
  • LucianSquare Lucian's Lightslinger Lightslinger deals 100% AD against minions on the second shot.
  • Miss FortuneSquare Miss Fortune's Love Tap Love Tap causes her to deal 60 - 100% AD bonus physical damage on auto attacks against unmarked targets.
  • SkarnerSquare Skarner's Crystal Slash Crystal Slash deals 33 / 36 / 39 / 42 / 45% AD (+ 30% AP) on subsequent casts for 4 seconds after hitting an enemy.

Items

  • Doran's Shield item Doran's Shield: Passive: Basic attacks deal an additional 5 physical damage to minions on hit. Unlike most sources of bonus damage, this is added after damage modifier calculations.

Decreasing damage dealt

Champion abilities

Note: Only the damage modifier effect of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.

Summoner Spell

  • Exhaust Exhaust: Exhausts target enemy champion, Slow icon slowing them by 30%, and reducing their damage dealt by 40% for 2.5 seconds. (650 range) (210 second cooldown)

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

Note: Only the damage modifier effect of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.

Champion abilities

  • VladimirSquare Vladimir's Hemoplague Hemoplague affects all targets hit to receive 10% increased damage from all sources for the next 5 seconds.

Items

  • Abyssal Mask item Abyssal Mask: Aura: Unique: Nearby enemy champions take 10% more magic damage (700 range).

Decreasing damage received

Champion abilities

Note: Only the damage modifier effect of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.

  • AlistarSquare Alistar's Unbreakable Will Unbreakable Will grants him 55% / 65% / 75% damage reduction for 7 seconds.
  • AnnieSquare Annie's Molten Shield Molten Shield grants her 16% / 22% / 28% / 34% / 40% damage reduction for 3 seconds.
  • BraumSquare Braum's Unbreakable Unbreakable grants him 30% / 32.5% / 35% / 37.5% / 40% damage reduction from oncoming sources (excluding true damage and towers) for 3 / 3.25 / 3.5 / 3.75 / 4 seconds. The damage reduction is increased to 100% for the first source of champion damage that would be reduced.
  • GalioSquare Galio's Shield of Durand Shield of Durand grants him 20 / 25 / 30 / 35 / 40% (+ 8% per 100 bonus MR) damage reduction while channeling for up to 2 seconds and for another 2 seconds after casting the ability again.
    • GalioSquare Galio's Hero's Entrance Hero's Entrance grants the target ally 20 / 30 / 40%(+ 8% per 100 bonus MR) damage reduction until he lands.
  • GarenSquare Garen's Courage Courage places a defensive shield on himself, decreasing all damage taken by 30% for 2 / 3 / 4 / 5 / 6 seconds.
  • GragasSquare Gragas' Drunken Rage Drunken Rage makes him take a long swig from his barrel, disabling his ability to cast or attack for 1 second and receive 10% / 12% / 14% / 16% / 18% reduced damage for 3 seconds.
  • KassadinSquare Kassadin's Void Stone Void Stone reduces all magic damage taken by 15%.
  • MalzaharSquare Malzahar's Void Shift Void Shift grants him 90% damage reduction against the first spell or autoattack that hits him, lingering for 0.25 seconds.
  • MaokaiSquare Maokai's Vengeful Maelstrom Vengeful Maelstrom creates a great vortex of natural energy around himself reducing non-tower damage done to allied champions in the area by 20% up to 10 seconds.
  • Master YiSquare Master Yi's Meditate Meditate grants him 50 / 55 / 60 / 65 / 70% damage reduction up to 4 seconds while channeling.
  • WarwickSquare Warwick's Primal Howl Primal Howl grants him 35 / 40 / 45 / 50 / 55% damage reduction for 2 seconds or until he reactivates the ability.

Summoner Spells

Items

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

Items

  • Guardian Angel item Guardian Angel: Passive: Unique: Upon taking lethal damage, restores 50% of base health and 30% of maximum mana after 4 seconds of Stasis icon stasis (300 second cooldown).
  • Stopwatch item Stopwatch: Active: Unique – Stasis: Put yourself in Stasis icon stasis for 2.5 seconds, rendering yourself untargetable and invulnerable for the duration, but also unable to move, attack, cast spells, or use items during this time.
  • Wooglet's Witchcap item Wooglet's Witchcap: Active: Unique – Stasis: Put yourself in Stasis icon stasis for 2.5 seconds, rendering yourself untargetable and invulnerable for the duration, but also unable to move, attack, cast spells, or use items during this time (120 second cooldown).
  • Zhonya's Hourglass item Zhonya's Hourglass: Active: Unique – Stasis: Put yourself in Stasis icon stasis for 2.5 seconds, rendering yourself untargetable and invulnerable for the duration, but also unable to move, attack, cast spells, or use items during this time (120 second cooldown).

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, MalzaharSquare Malzahar's Malefic Visions Malefic Visions ticks 8 times, so 1 flat damage reduction would reduce its total damage by 8.

Flat damage reduction does not work against true damage.

Champions

  • AmumuSquare Amumu's Tantrum Tantrum provides 2 / 4 / 6 / 8 / 10 physical flat damage reduction.
  • FizzSquare Fizz's Nimble Fighter Nimble Fighter provides 4 / 6 / 8 / 10 / 12 / 14 flat damage reduction against auto-attacks.

Items

  • Guardian's Horn item Guardian's Horn: Passive: Unique: Blocks 12 damage from all champions sources (3 damage vs. damage over time abilities).