There's more to this warrior than meets the eye. Her strengh is due to nano technology flowing throuh her veins. This also enhances her speed. Thus she is in the midst of battle, moving so fast, she appears invisble to her apponents. This enables her to go into a killing frenzy, without being damaged herself. Neet trick. Amazon design my own. Nano tech. idea due to Dan Simmons....Supperior king of sci.fi. novells.