Together as One is a rare Sorcery card from Secrets of Strixhaven (SOS), collector number 307. Current market price: $0.74 (foil $0.56), TCGplayer market prices via Scryfall.
Converge — Target player draws X cards, Together as One deals X damage to any target, and you gain X life, where X is the number of colors of mana spent to cast this spell.