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Suppression was rumored to be a mastery coupled with the Stifle Stifle summoner spell, but, like the summoner spell it modifies, was never implemented into the actual game.

Effect per rank

  • Reduces the cooldown of Stifle Stifle by 10 seconds, and increases the duration by 0.5 seconds
  • Also, the champion affected by Stifle will deal 75% reduced damage and take 25% increased damage, instead of 60% and 20%, respectively.
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