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: Double Feature]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/7109d39f-d6e4-54bb-a476-7fcca8f4bea8.png?v=1698557039&width=1445)