Unstoppable Force

While you are in the stance provided by Immovable Object, you ignore difficult terrain and greater difficult terrain. Once per 10 minutes, if you Dismiss your Immovable Object stance, you can Stride as a free action. At the end of that Stride, your final footfall causes an explosion of energy. Each creature within a 20-foot emanation takes 14d6 force damage (reflex save against your class DC). Creatures that fail the save are also knocked Prone.