Unesh, Criosphinx Sovereign is a mythic Legendary Creature — Sphinx card from Hour of Devastation (HOU), collector number 52. Current market price: $10.86 (foil $12.30), TCGplayer market prices via Scryfall.
Flying Sphinx spells you cast cost {2} less to cast. Whenever Unesh or another Sphinx you control enters, reveal the top four cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.