name: Grolnok, the Omnivore
printings: DBL, PVOW, VOW
text: Whenever a Frog you control attacks, mill three cards.
  Whenever a permanent card is put into your graveyard from your library, exile it with a croak counter on it.
  You may play lands and cast spells from among cards you own in exile with croak counters on them.
type: Legendary Creature — Frog