Selesnya Guildmage is a uncommon Creature — Elf Wizard card from Ravnica Remastered (RVR), collector number 221. Current market price: $0.23 (foil $0.25), TCGplayer market prices via Scryfall.
{3}{G}: Create a 1/1 green Saproling creature token. {3}{W}: Creatures you control get +1/+1 until end of turn.