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.
![Grolnok, the Omnivore [Innistrad: Crimson Vow Prerelease Promos]](http://tothetablebgc.myshopify.com/cdn/shop/files/ac6bae00-e965-4664-b3c7-d160949245a1_a4337203-6686-4758-9021-73819f3d5a3c.png?v=1776378895&width=1445)
