Undead Dragon

One of the Ancient Dragons. In Guild Wars 2, this monstrosity raised Orr from it's underwater tomb, and created an undead army using both the lost souls in Orr, as well as the Corsairs that had been using the area as a hide out.

The location of this hibernating monster is not known, but is assumed that it is somewhere near the ruins of Orr.

also it was written in the guild wars manuscripts that there are rumors about an undead former great dragon leading the undead into battle.