Gruul Keyrune is a uncommon Artifact card from Gatecrash (GTC), collector number 230. Current market price: $0.14 (foil $0.63), TCGplayer market prices via Scryfall.
{T}: Add {R} or {G}. {R}{G}: This artifact becomes a 3/2 red and green Beast artifact creature with trample until end of turn.