Nomads' Assembly is a rare Sorcery card from Rise of the Eldrazi (ROE), collector number 39. Current market price: $0.57 (foil $1.83), TCGplayer market prices via Scryfall.
Create a 1/1 white Kor Soldier creature token for each creature you control. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)