The Specter Saber is the sword wielded by Kesolis Stagg. It's origins are unknown, though many believe that the sword is a part of Kesolis' being and was created from his own body.
When in the possession of Kesolis or one of his brothers, the sword has the ability to become intangible and rip the soul out of beings so they can be absorbed by the user. As it is connected with Kesolis' armor, the sword can repair itself if damaged or broken.
It was lost when Kesolis was merged into The Evaporous , but has since been reformed.
Kesolis is very protective of this sword for unknown reasons.