Ok, so i noticed people pointing out its hard for a new player to train a dragon for stars.
Here is a possible solution, as the title suggests, request the dragon by name or names that you require in the area. Someone will then quote your request and then give an in game name to look for so you can look for them to get your book stars.
Server: (since the arena's aren't cross server)
Dragon Name: Lava
Dragon Name: Grave Rider
Dragon Name: Calculus
That is just one example of a team you could request help with.
The player who then quotes your request then gives a player name they have the dragons on in the arena for that player or others to fight.