The Maddening Roar
Kallas is an intelligent longsword obtained by Breland during the Last War. Kallas was found in the hands of a Karrnathi general in command of a particularly large and powerful undead force.
Kallas was stolen from a Brelish military vault by Lucan Stellos, a former Brelish intelligence agent who became a vampire through unknown means. The party tracked down Lucan and retrieved the sword, at which point they discovered that it had telepathic powers as well as the ability to control the actions of those who possessed it. The sword has revealed to both Jak and Tivira that it wishes to return to Karrnath.