Enigmatic Incarnation is a rare Enchantment card from Theros Beyond Death Promos (PTHB), collector number 215s. Current market price: — (foil $0.50), TCGplayer market prices via Scryfall.
At the beginning of your end step, you may sacrifice another enchantment. If you do, search your library for a creature card with mana value equal to 1 plus the sacrificed enchantment's mana value, put that card onto the battlefield, then shuffle.