Assemble the Legion is a rare Enchantment card from Ravnica Remastered (RVR), collector number 163. Current market price: $0.35 (foil $0.38), TCGplayer market prices via Scryfall.
At the beginning of your upkeep, put a muster counter on this enchantment. Then create a 1/1 red and white Soldier creature token with haste for each muster counter on this enchantment.