Gyrus, Waker of Corpses is a mythic Legendary Creature — Hydra card from Treasure Chest (PZ2), collector number 70661.
Gyrus enters with a number of +1/+1 counters on it equal to the amount of mana spent to cast it. Whenever Gyrus attacks, you may exile target creature card with lesser power from your graveyard. If you do, create a token that's a copy of that card and that's tapped and attacking. Exile the token at end of combat.