Lone Revenant

Hexproof (This creature can't be the target of spells or abilities your opponents control.) Whenever this creature deals combat damage to a player, if you control no other creatures, look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o78134d7jpb1hudxoq18w.