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Tenacity icon.png Tenacity (or Crowd Control Reduction) is a stat that reduces the duration of all incoming Stun icon.png crowd control status effects except Airborne icon.png airborne, Drowsy icon.png drowsy, Kinematics icon.png kinematics, Nearsight icon.png nearsight, Stasis icon.png stasis, and Suppression icon.png suppression. The stat is the percentage by which the duration is reduced. This reduction is limited, the duration can never drop below 0.5 seconds. The duration of the crowd control is calculated at the time of application and does not change if the tenacity changes.

Increasing tenacity

Tenacity can be increased with champion abilities, items, runes, and summoner spells, stacking either Multiple stacking icon.png multiplicatively or Additive stacking icon.png additively depending on the combination of the effects.



Champion abilities


Summoner Spells

Game Modes


"Time doesn't heal all wounds."
This article is outdated. Please update this article to reflect recent events or newly available information.
  • This section is in the process of being updated. More of the new effects may stack additively with one of these combinations.
This article was last edited by FarCritical on 11-Apr-2021 07:45.

These are the combinations that stack additively:

All the other combinations stack multiplicatively.

Reducing Tenacity

Tenacity can be reduced to negative values, causing crowd control to last longer.

Champion Abilities


  • Rift Scuttler Rift Scuttler has -100% tenacity, doubling the duration of crowd control effects applied to her. This stacks additively with Brittle icon.png Brittle for a total of -130% tenacity.


  • Until patch V1.0.0.118, Tenacity was an unnamed effect unique to Mercury's Treads Mercury's Treads. That patch promoted the effect to a champion statistic and added three new items: Cloak and Dagger Cloak and Dagger, Eleisa's Miracle Eleisa's Miracle and Moonflair Spellblade Moonflair Spellblade (all later removed). Tenacity from multiple sources did not stack, similar to Enhanced Movement. In Season Three there was an item overhaul, named item effects were introduced, and 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's Cho'Gath's Vorpal Spikes Vorpal Spikes and Baron Nashor's Baron Nashor's passive. Between the introduction of season 3 changes and V3.01, it shared the same icon as the Tenacious mastery. As of V3.01, it no longer has an icon in the buff bar.
  • Prior to the Preseason of 2021, a website news post was made that announced that Tenacity would reduce the duration of Airborne icon.png knockups. However, the change was confirmed to have been cancelled.[1]
    • Predating the announcement, in the V4.01 April Fools' Day patch, the following change regarding tenacity was jokingly listed:
      • Airborne icon.png Knockups are now reduced by Tenacity and other forms of crowd control reduction.

Last updated: November 20, 2019, patch V9.23

1 - ((1 - (0.6 0.6 + 0.15 0.15)) × (1 - (0.25 0.25 + 0.2 0.2)) × (1 - 0.3 0.3) × (1 - (0.3 0.3 + 0.3 0.3)) × (1 - 0.65 0.65) = 
1 - (0.25 × 0.55 × 0.7 × 0.4 × 0.35) = 98.652%
  • With this amount of tenacity, Nasus' Nasus' Wither Wither (longest crowd control in the game) would only last 0.067 seconds. The minimum crowd control duration prevents this.
  • Note that this amount of tenacity can only be achieved briefly with Courage Courage wearing off almost immediately, and with Cleanse Cleanse and Sterak's Gage Sterak's Gage which grant a temporary buff.
  • With the Ultra Rapid Fire buff enabled, the maximum tenacity achievable is 98.989%.
1 - (0.25 × 0.55 × 0.7 × 0.4 × 0.35 × 0.75) = 98.989%
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