Yennett, Cryptic Sovereign is a rare Legendary Creature — Sphinx card from Commander Masters (CMM), collector number 363. Current market price: $0.60 (foil $0.65), TCGplayer market prices via Scryfall.
Flying, vigilance, menace Whenever Yennett attacks, reveal the top card of your library. You may cast it without paying its mana cost if its mana value is odd. If you don't cast it, draw a card.