Patron of the Growth

Elk or Zombie offering (You may cast this card
any time you could cast an instant by sacrificing an
Elk or a Zombie and paying the difference in mana
costs between this and the sacrificed Elk or Zombie.
Mana cost includes color.)
Whenever Patron of the Growth attacks, you may return target creature card from your graveyard
to the battlefield with power less than Patron of
the Growth's power.