Activated Sleeper is a rare Creature — Phyrexian Shapeshifter card from Dominaria United Commander (DMC), collector number 74. Current market price: $1.58 (foil $1.66), TCGplayer market prices via Scryfall.
Flash You may have this creature enter as a copy of any creature card in a graveyard that was put there from the battlefield this turn, except it's a Phyrexian in addition to its other types.