Bella, the Miniature Cow

+1: Discard a card, then flip a coin. If heads, then return target card from your graveyard to your hand. Otherwise, return the discarded card.
-1: Until your next turn, Bella is a 3/3 cat creature. If Bella is blocked by a creature with power 3 or greater, Bella becomes a 10/10 cat creature.
-7: Target creature is hungry until end of turn. (A hungry creature gets +X/+X and trample, where X is the number of hours since feeding time!)