The story takes place in the Zel'tur world (different of standard Warcraft). A world in witch demons don't posses no danger to the races that live here because of The Mage's Collective.
This is the strongest hero the Mage's Collective has. During the campaign the Mage's Collective will have a deal with this Dragon (will have a name and everything of course).
For now he will be available in the melee map , I will release next week :)