Genesis Wave is a rare Sorcery card from Foundations (FDN), collector number 221. Current market price: $0.35 (foil $0.51), TCGplayer market prices via Scryfall.
Reveal the top X cards of your library. You may put any number of permanent cards with mana value X or less from among them onto the battlefield. Then put all cards revealed this way that weren't put onto the battlefield into your graveyard.