Play the free version of this great indirect control strategy based on the hit game Majesty: The Northern Expansion!
Do you know the easiest way to get rid of a dragon?
Just dip a nice chunk of meat in a barrel full of poison and feed it to that dragon. Of course it's not the most heroic method but it is very safe and effective.
Another option is to offer a bounty on the dragon's scales. After that the only thing you have to do is wait while the army of heroes, wizards and freaks drive a monster to its end.