Foul Emissary

When this creature enters, look at the top four cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest on the bottom of your library in any order. When you sacrifice this creature while casting a spell with emerge, create a 3/2 colorless Eldrazi Horror creature

token.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o98y1611jpb1hqmzysjow.