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, masteries, and summoner spells. All tenacity stacks multiplicatively, other than items' which stack additively.

Increasing Tenacity

Items

Champion abilities

  • Dr. Mundo Dr. Mundo's Burning Agony.png Burning Agony grants him 10 / 15 / 20 / 25 / 30% tenacity while toggled on.
  • Garen Garen's Courage.png Courage grants him 60% tenacity for the first 0.75 seconds.
  • Irelia Irelia's Ionian Fervor.png 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.

Masteries

Summoner Spells

Ways to reduce Tenacity

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

Trivia

  • Until patch V1.0.0.118, Tenacity was an unnamed effect unique to Mercury's Treads item.png Mercury's Treads. In the aforementioned patch, the effect was promoted into a champion statistic and three additional items were added: Cloak and Dagger item.png Cloak and Dagger (removed item), Eleisa's Miracle item.png Eleisa's Miracle (removed item) and Moonflair Spellblade item.png Moonflair Spellblade. Tenacity from multiple sources did not stack, similar to Enhanced Movement. With the Season Three item overhaul and the introduction of named item effects, Tenacity was reverted to an item effect. In V3.01, all sources of crowd control reduction were changed to say "Tenacity" and Tenacity was reintroduced as a champion statistic.
  • Until Season Three, Tenacity's in-game icon was the same as the icon used for Cho'Gath Cho'Gath's Vorpal Spikes.png Vorpal Spikes and Baron Nashor Baron Nashor's passive. Between the introduction of season 3 changes and V3.01, it shared the same icon as the Tenacious mastery 2013.png Tenacious mastery. As of V3.01, it no longer has an icon in the buff bar.

Last updated: 11/10/2017 on patch V7.20

1 - ((Cleanse.png 1 - 0.65) × (Courage.png 1 - 0.6) × (Elixir of Iron item.png 1 - 0.25) × (Moonflair Spellblade item.png 1 - 0.35) × (Sterak's Gage item.png 1 - 0.3) × (Swiftness mastery 2016.png 1 - 0.15)) = 95.939125%
  • With this amount of tenacity, the longest crowd control in the game Nasus Nasus' Wither.png Wither, which usually lasts 5 seconds, will only last 0.2 seconds.
    • In comparison, a champion targeted by Nasus Nasus' Wither.png Wither, with 2 Brittle stacks (-60% tenacity), will be slowed for 8 seconds.