After the cut scene{after she stops babbling on} LOL! get right beside her as quickly as possible keep pounding her with your sword or axe and when she starts to move keep on her and keep slashing.You will notice that she is trying to cast a spell with the ball in her hand.As long as you don't let her do this she is easy enough to dispense. Hope this helps!!! P.S. There are other posts here if you are not a warrior or are more involved but i found this the easiest way to defeat her once and for all.