Utopia Sprawl is a uncommon Enchantment — Aura card from Ravnica Remastered (RVR), collector number 355. Current market price: $1.81 (foil $4.75), TCGplayer market prices via Scryfall.
Enchant Forest As this Aura enters, choose a color. Whenever enchanted Forest is tapped for mana, its controller adds an additional one mana of the chosen color.