there is a power or a spell in this video that i really need help identify. it is the mod where he looks like he is using his blades. i have been looking high and low for this mod and can not get a answer so if you could please help me that would be great.

http://www.youtube.com/watch?v=FVCXzJdAOn8&feature=share&list=FLaIU_0ZAn5IkYXEk7qaKToA