Write into Being is a common Sorcery card from Ugin's Fate (UGIN), collector number 59. Current market price: $0.59, TCGplayer market prices via Scryfall.
Look at the top two cards of your library. Manifest one of those cards, then put the other on the top or bottom of your library. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)