Grolnok, the Omnivore

잡식성 동물, 그롤노크 (Grolnok, the Omnivore) (ko)

Legendary Creature - Frog | Power/Toughness: 3 / 3 (CMC 4)
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.