Enigma Sphinx is a rare Artifact Creature — Sphinx card from Planechase 2012 (PC2), collector number 89. Current market price: $0.29, TCGplayer market prices via Scryfall.
Flying When this creature is put into your graveyard from the battlefield, put it into your library third from the top. Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)