The Kil'sorrow are a clan of Orcs part of the Shadow Council. They inhabit Kil'sorrow Fortress in Nagrand. They are aggressive to both the Horde and the Alliance.
Giselda the Crone of Kil'sorrow and her lackeys are known for murder, ritual sacrifice, communing with the Legion, kidnapping, and burglary. The Mag'har and the Kurenai want their death.
In Oshu'gun, the Kil'sorrow Ritualist torture the ancestral spirit and drain the energy of Ku're, a naaru, with the help of some demons, as terrorfiends and shivarra. They want absorb the energy to increase the number of Voidspawn in their own ranks.
With the help of Lantresor of the Blade, the Horde and Alliance create a open war between them and Warmaul clan.