The assassin Callibius, once the head of the Quisalis Mark, was killed in 385 AF during the Vertani destruction of Thera. He was succeeded by his son, Derillin Yu'tar.
His undead form can be seen in his ruined Old Thera cottage in Griesly family manor as but a putrid shadow of his former self.
Callibius once served as the mentor of Lord Makarta, who later went on to found the Ivory Mark.
A shadowy Callibius battle figurine takes his likeness.