Eidolon of the Great Revel
{R}{R}
Enchantment Creature — Spirit
Oracle Text
Whenever a player casts a spell with mana value 3 or less, this creature deals 2 damage to that player.
Watch Out
Cast trigger fires even if counteredWatch Out
This triggers when the spell is cast, before it resolves. Even if the spell is countered, the cast trigger still resolves. Copies of spells are not cast, so they won't trigger this.