Gyrus, Waker of Corpses

Gyrus, enters the battlefield 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.