Ixhel, Scion of Atraxa is a mythic Legendary Creature — Phyrexian Angel card from Phyrexia: All Will Be One Commander (ONC), collector number 1. Current market price: $2.46 (foil $2.78), TCGplayer market prices via Scryfall.
Flying, vigilance, toxic 2 Corrupted — At the beginning of your end step, each opponent who has three or more poison counters exiles the top card of their library face down. You may look at and play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast those spells.