Originally posted by Pugzilla83:

I killed her using the Mistwalker and the Bonemass power. All i did was lure lure her to the entrance and if my health got low, i would go outside and heal up and head right back at it. Sometimes when you re-enter the lair she would phase thru the entrance walls and you could get some free hits on her. I just kept repeating it until she was dead :lightbringer:

This is pretty much what I did as well. Had the thunder spear for when enemies started to get to much, and mistwalker to slowly chunk her down. It takes a while, mostly after bonemass runs out. I even moved my black forge over to just outside of the cavern that has her so I could repair my equipment as it got low.