Board Thread:Dragon City Gameplay Questions & Answers/@comment-203.168.182.218-20130629044657

I just played in the Combat World, and someone there who is level 21 has a Mirror Dragon in his team. I visited him and saw that there was a legendary habitat. My question is, shouldn't the legendary habitat be available only after lv 24? If so, how come that person has one with a premature level? Please answer, thanks! 