Gift of the Gargantuan is a common Sorcery card from Shards of Alara (ALA), collector number 132. Current market price: $0.13 (foil $0.44), TCGplayer market prices via Scryfall.
Look at the top four cards of your library. You may reveal a creature card and/or a land card from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in any order.