Talk:Game Updates/@comment-99.246.136.192-20130221161859/@comment-60.240.68.239-20130221190703

Limited dragons, epics and gemstones, opposite hybrids and uncommon hybrids. (All these dragons have atypical breeding requirements.)

The Epic Breeding Island/Sanctuary slightly raises the chances for all those dragons, so it follows that level 15+ parents will do the same. Backflip Studios described the effects in exactly the same way.