Volrath's Shapeshifter is a rare Creature — Phyrexian Shapeshifter card from Stronghold (STH), collector number 48. Current market price: $13.90, TCGplayer market prices via Scryfall.
As long as the top card of your graveyard is a creature card, this creature has the full text of that card and has the text "{2}: Discard a card." (This creature has that card's name, mana cost, color, types, abilities, power, and toughness.) {2}: Discard a card.