Dragons are the main purpose to the game. You create a team using 8 dragons, and destroy other bases. You obtain dragons by hatching eggs. Originally you could get the dragons through leveling up. There are categories and stages of egg. Common, rare, epic and legendary. These varied upon the strength of the dragon. There are also colour classes. From lowest in level to highest, red, purple, blue, yellow and green. The incubator must be levelled up to hatch each of these levels. Red, for the basic level 1, purple for level 2, and so on.
The dragons ingame: