How to duplicate your Dragon Village Account:

1. Get another phone or android tablet.

2. Download Dragon Village to it

3. Enter your existing name and password.

Your new android or tablet will now be a duplicate of your account complete with all the dragons, cards, diamonds, items, and elements. You can then play and each system will be different from then on.

You can then try out more dragons without using a "have more dragon".
I suppose you could also send all the elements to a third friend.