Grolnok, the Omnivore
From Innistrad: Crimson Vow set
Grolnok, the Omnivore
Legendary Creature — Frog
3/3
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.