Verdant Haven is a common Enchantment — Aura card from Gatecrash (GTC), collector number 138. Current market price: $0.06 (foil $0.41), TCGplayer market prices via Scryfall.
Enchant land When this Aura enters, you gain 2 life. Whenever enchanted land is tapped for mana, its controller adds an additional one mana of any color.