Sphinx of Clear Skies is a mythic Creature — Sphinx card from Dominaria United (DMU), collector number 396. Current market price: $0.43 (foil $0.45), TCGplayer market prices via Scryfall.
Flying, ward {2} Domain — Whenever this creature deals combat damage to a player, reveal the top X cards of your library, where X is the number of basic land types among lands you control. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard. (Piles can be empty.)