Talk:Chamber of Lament/@comment-27323866-20151202035018/@comment-24634511-20151202122041

It's normal.

See Ur-Dragon - it has an estimated 3,000,000,000 health. At lv 120 you'll probably be able to do 1-4 million per round (~0.1%)

Try going temporalily offline in pause menu settings - the online dragon is a lot weaker - if you fight it you can easily see if your tactics are good.