Grove of the Guardian is a rare Land card from Return to Ravnica Promos (PRTR), collector number 240★. Current market price: — (foil $0.40), TCGplayer market prices via Scryfall.
{T}: Add {C}. {3}{G}{W}, {T}, Tap two untapped creatures you control, Sacrifice this land: Create an 8/8 green and white Elemental creature token with vigilance.