Clocknapper is a rare Creature — Human Spy card from The List (Unfinity Foil Edition) (ULST), collector number 14. Current market price: — (foil $0.24), TCGplayer market prices via Scryfall.
When this creature enters, choose beginning phase, first main phase, combat phase, postcombat main phase, or ending phase. Steal that phase from target player during their next turn. (That phase occurs as though it's your turn instead.)