Board Thread:Dragon City Gameplay Questions & Answers/@comment-1.22.35.144-20130623045414/@comment-114.77.210.10-20130627094220

I just got it with a Coolfire 15 + Armadillo 12 (no booster) and it took 20 hours however using this combination will probably get you more legendaries (Wind, Legendary, Wind & Crystal which take 48 hours).