Quantum Riddler is a mythic Creature — Sphinx card from Edge of Eternities (EOE), collector number 305. Current market price: $44.28 (foil $55.99), TCGplayer market prices via Scryfall.
Flying When this creature enters, draw a card. As long as you have one or fewer cards in hand, if you would draw one or more cards, you draw that many cards plus one instead. Warp {1}{U}