Grolnok, the Omnivore VOW/324

Set: Innistrad: Crimson Vow
Collector Code: VOW/324
Name: Grolnok, the Omnivore
Type: Legendary Creature — Frog
Oracle 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.
Rarity: Rare