Shimmerwilds Growth is a uncommon Enchantment — Aura card from Lorwyn Eclipsed (ECL), collector number 194. Current market price: $0.26 (foil $0.36), TCGplayer market prices via Scryfall.
Enchant land As this Aura enters, choose a color. Enchanted land is the chosen color. Whenever enchanted land is tapped for mana, its controller adds an additional one mana of the chosen color.