Redcap Gutter-Dweller

Menace
When this creature enters, create two 1/1 black Rat creature tokens with "This token can't block."
At the beginning of your upkeep, you may sacrifice another creature. If you do, put a +1/+1 counter on this creature and exile the top card of your library. You may play that card this turn.

Foundations

Wilds of Eldraine Promos

Wilds of Eldraine

Menace
When Redcap Gutter-Dweller enters the battlefield, create two 1/1 black Rat creature tokens with "This creature can't block."
At the beginning of your upkeep, you may sacrifice another creature. If you do, put a +1/+1 counter on Redcap Gutter-Dweller and exile the top card of your library. You may play that card this turn.

If Redcap Gutter-Dweller leaves the battlefield after its last ability has triggered, you can still sacrifice a creature and exile the top card of your library, even though you won't put a +1/+1 counter on Redcap Gutter-Dweller.

You pay all costs and follow all normal timing rules for cards played with the permission granted by Redcap Gutter-Dweller's last ability. For example, if the exiled card is a land card, you may play it only during your main phase while the stack is empty.