Board Thread:Dragon City Gameplay Questions & Answers/@comment-28369906-20130607113649/@comment-1912161-20130608111755

for the first fight maybe use a cool fire dragon. lvl 15, and trained ice attack. it should be able to defeat butterfly with 2 hits.at the same time, butterfly can only use physical attacks agains cool fire, so cool fire should survive into the second match - in which it will die after the first attack, but you get the first attack. so you need dragons that can defeat a pure in 3 rounds (~6.500 average damage) and withstand their attacks for 3 rounds (probably about 20.000 life needed).

a second approach needs a pure dragon: a pure can eat butterfly in one round AND survive a few hits from the second dragon.

thus... try to get a pure. level it as high as possible and it will eat butterfly and almost one of the pures. your 2 legendaries should suffice to beat the last "1.5" pures.