Tenacity (or Crowd Control Reduction) is a stat that reduces the duration of all crowd control effects at the exception of Suppression icon suppression, Stasis icon stasis, and Airborne icon displacements. Tenacity can be obtained through champion abilities, items, runes, and summoner spells. All tenacity stacks multiplicatively, other than items' which stack additively.

Increasing Tenacity


Champion abilities

  • Dr. MundoSquare Dr. Mundo's Burning Agony Burning Agony grants him 10 / 15 / 20 / 25 / 30% tenacity while toggled on.
  • GarenSquare Garen's Courage Courage grants him 60% tenacity for the first 0.75 seconds.
  • IreliaSquare Irelia's Ionian Fervor Ionian Fervor grants her tenacity based on if she is outnumbered or not. If she has the number's advantage she gains 0% tenacity, if it is an even fight she gains 10% tenacity, and if she's outnumbered she gains 25 / 30 / 35 / 40% tenacity.


Summoner Spells

Game Modes

Reducing Tenacity

Brittle icon Brittle is a status effect that can be applied by OrnnSquare Ornn's Bellows Breath Bellows Breath and Call of the Forge God Call of the Forge God. Enemies can have up to 2 marks of Brittle icon Brittle.

Each mark reduces the target's tenacity by 30% or in other words, increases the duration of incoming Crowd Control by 30% (including Airborne icon Airborne effects).


Last updated: November 28, 2017, patch V7.23

Note: Elixir of Iron item Elixir of Iron and Travel Size Elixir of Iron item Travel Size Elixir of Iron stack additively.
1 - ((Cleanse 1 - 0.65) × (Courage 1 - 0.6) × (1 - (Elixir of Iron item 0.25 + Travel Size Elixir of Iron item 0.25)) × (Moonflair Spellblade item 1 - 0.35) × (Sterak's Gage item 1 - 0.3) × (Unflinching rune 1 - 0.2) × (Unflinching rune 1 - 0.15)) = 98.267%
  • With this amount of tenacity, the longest crowd control in the game NasusSquare Nasus' Wither Wither, which usually lasts 5 seconds, will only last 0.09 seconds.
    • In comparison, a champion targeted by NasusSquare Nasus' Wither Wither, with 2 Brittle stacks (-60% tenacity), will be slowed for 8 seconds.
  • With the Ultra Rapid Fire buff enabled, the maximum tenacity achievable is 98.701%