Talk:Main Quest: Agartha/@comment-5328776-20170630113853/@comment-31847937-20170630121319

In the first fight you need to kill it about three times and battle will end.

And in second fight the boss will have timed debuff. You have to wait until that debuff triggered then you can kill it for good. I'm not sure how many turns you have to wait. But you can keep killing it as it will received max hp down every time you kill it.