Living Conundrum is a uncommon Creature — Elemental card from Murders at Karlov Manor (MKM), collector number 63. Current market price: $0.23 (foil $0.21), TCGplayer market prices via Scryfall.
Hexproof If you would draw a card while your library has no cards in it, skip that draw instead. As long as there are no cards in your library, this creature has base power and toughness 10/10 and has flying and vigilance.