Grolnok, the Omnivore [Innistrad: Crimson Vow]

Set: Innistrad: Crimson Vow Type: Legendary Creature — Frog Rarity: Rare Cost: {2}{G}{U} 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.