Choose the debuff and buff you're looking for:
Mythical Champion who sets the debuff: -50% Precision
Legendary Champion who sets the debuff: -50% Precision
Epic Champion who sets the debuff: -50% Precision
Champion Rare who sets the debuff: -50% Precision
Champion Uncommon who sets the debuff: -50% Precision
Champion Commun who sets the debuff: -50% Precision