As heros so u can use the dragons you earned instead of being stuck with one u put too much in making the others useless. Do the same inherit you have on heros so u can always mix it up for the dragon fights and for other fights till u decide to settle on a permenant dragon on your own. Also while we at it we need a multi server add for friends so more can add each other across servers. You could also incorporate a fairy that help a few rounds based off levels it has grown and they can range from defensive and offensive abilities. Just a few ideas that also helped League of angels grow but with a different twist.