Dear dragon city
I have an idea for an update you should do to the game.
The idea is clan for example:
I open a clan and my friends join the we can battle vs other clan and the winner get a gem or food or gold and sometimes events for it .
Hope you add u will ad it
My user (for you will know who i am in the game) is:

They sort of already did this. They just call it Monster Legends.