Board Thread:General Discussion/@comment-171.252.44.131-20130628094112/@comment-11260834-20130628100833

Well, to defeat Pure Ice Dragon - Use another Pure Dragon with the same lvl than the pure ice dragon

To defeat Pure dragon use on of the legendary in a high lvl (it works on me)

To defeat Crystal Dragon Use a legendary-type  dragon with higher lvl than the one you are fighting...

Hope it helps :-D