Curator of Destinies is a rare Creature — Sphinx card from Foundations (FDN), collector number 34. Current market price: $0.24 (foil $0.37), TCGplayer market prices via Scryfall.
This spell can't be countered. Flying When this creature enters, look at the top five cards of your library and separate them into a face-down pile and a face-up pile. An opponent chooses one of those piles. Put that pile into your hand and the other into your graveyard.