Saproling Symbiosis is a rare Sorcery card from Invasion (INV), collector number 209. Current market price: $1.70 (foil $8.66), TCGplayer market prices via Scryfall.
You may cast this spell as though it had flash if you pay {2} more to cast it. (You may cast it any time you could cast an instant.) Create a 1/1 green Saproling creature token for each creature you control.