User blog comment:Dream Mist the Dragon Trainer/I need help!/@comment-30757918-20161215160431/@comment-25114779-20161215200740

Terrible Terror and Mildew's Strain come to mind as well as Rattting Smokebreath.

There are a few easy to level Premium Dragons, but getting one of them is hard to do.

Smothering Smokebreath, Gothi's Pet (any Terrible Terror species will do), Stormfly's Offspring , Meatlug's Offspring , Gronckle and Monstrous Nightmare.