Werewolf

Trample
Whenever Werewolf deals combat damage to a nonartifact creature, you may pay {x}{x}{b/g}. If you
do, put X were counters on that creature.
Whenever a creature dies, if the number of were counters on it is more than that creature's
toughness, return it from the graveyard to the battlefield under your control. It is a werewolf in addition to its other types.