Conclave Guildmage is a uncommon Creature — Elf Cleric card from Guilds of Ravnica (GRN), collector number 162. Current market price: $0.20 (foil $0.26), TCGplayer market prices via Scryfall.
{G}, {T}: Creatures you control gain trample until end of turn. {5}{W}, {T}: Create a 2/2 green and white Elf Knight creature token with vigilance.