When one tapped into the power of the Green Heart, extraordinary feets of magic could be performed. The power of the Green Heart was so tremendous that it could defy several of the laws of Elemental Transfiguration. It could also enable a muggle to do magic like a wizard, and even allow a muggle to defeat a wizard in a duel. Arkos lost the green heart to the Dark Master when he was defeated, and the green heart was placed in the Hall of Treasures deep below hogwarts by its founders.