<class>, listen closely. Now that we have the brazier, and the means to light it, we still need another component to suffuse it with; something that will provide a focus strong enough to entice the spirit of my deceased, former comrade.
An ogre necromancer that traveled with us, Kormok, delighted in summoning forth the souls of the banished dead of Purgation Isle, off the south coast of the Hillsbrad Foothills. Go there and retrieve some Soul Ashes of the Banished from their remains.
A job well done, <name>. I will imbue the essence of the ashes into the brazier.
Now all that is left is to get into Scholomance, to Ras Frostwhisper's chamber, and use the brazier to summon forth the spirit of my former cohort, Kormok. The amulet piece, and Valthalak's spirit within, has corrupted him even further, and he will not rest until you forcibly take it from him.