Arboretum Elemental is a uncommon Creature — Elemental card from Guilds of Ravnica (GRN), collector number 122. Current market price: $0.11 (foil $0.38), TCGplayer market prices via Scryfall.
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Hexproof (This creature can't be the target of spells or abilities your opponents control.)