Soul Summons is a common Sorcery card from Fate Reforged (FRF), collector number 26. Current market price: $0.04 (foil $0.16), TCGplayer market prices via Scryfall.
Manifest the top card of your library. (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.)