Clan Guildmage is a uncommon Creature — Human Shaman card from Ravnica Allegiance (RNA), collector number 162. Current market price: $0.07 (foil $0.40), TCGplayer market prices via Scryfall.
{1}{R}, {T}: Target creature can't block this turn. {2}{G}, {T}: Target land you control becomes a 4/4 Elemental creature with haste until end of turn. It's still a land.