Rabid Collector

Whenever a creature you control enters the battlefield, if it wasn't cast from your hand, you
may destroy target colorless, nonland permanent.
{3}{r}{r}, {t}: Create a 2/1 red and green Werewolf
creature token with "Champion a non-Werewolf creature". (When the token enters the battlefield, sacrifice it unless you exile a non-Werewolf creature
you control. When the token leaves the battlefield,
that card returns to the battlefield.)