Your search for "Overgrown Battlement 264" revealed the following:
Overgrown Battlement (TDC) from Tarkir: Dragonstorm Commander, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Franz Vohwinkel Card Text:DefenderT: Add G for each creature you control with defender.
Overgrown Battlement (Foil) (ROE) from Rise of the Eldrazi, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Franz Vohwinkel Card Text:DefenderT: Add G to your mana pool for each creature with defender you control.