Sandstalker Moloch

Flash When this creature enters, if an opponent cast a blue and/or black spell this turn, look at the top four cards of your library. You may reveal a permanent card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6op3e2if5vpb1hbmf0q638.