Board Thread:Dragon City Gameplay Questions & Answers/@comment-11292674-20130703073258/@comment-13710950-20130812125650

Use this

Lv.15 Blue Dragon (Trained with Canon Balls) with at least two Bronze Stars

Lv.16 Mirror Dragon ( Trained with Aurora Borealis)  with at least two Gold Stars

Lv.17 Soccer Dragon (Trained with Magma Storm or Cryogenic Freeze)  with at least two  Gold Stars