Can Never Forgive.

Just like most planes that gained access to the ancient battlefield, the Virut plane was also invaded. They were unlucky or, in this case, very lucky to be invaded by a dragon. It is normal to be invaded, but it is abnormal to be invaded by a dragon. The young dragon took a fancy to the plane and decided to make it its turf. Young, it may be, but it is not an easy opponent by any means. It didn't help that other races were attacking them too.

Dragons are proud and highly territorial. They only share lairs when they are reproducing. The young adults leave to lay claim to their own turf, where they will sleep most of the time. This dragon came to the Virut plane and settled down. It decided that the entire plane was its territory.