White Dwarf 121 (Jan 1990), p42 — GM's Information

The sword has indeed been stolen. On the advice of Hemler Rottingflesh, the Chaos Sorcerer of Nurgle who is ultimately responsible for Hagrod's sudden rise to a position of power, the Ogre sent a band of Orcs to loot Karad's tomb. Hemler assured him that if he possessed the sword he would able to cast a apell powerful enough to raze the town of Carroburg to the ground.

But Hemler lied; or rather he had too much faith in his own abilities. Now the sword lies useless in the Ogre's stronghold while the Sorcerer works out what to do with it.

Meanwhile, Karad's eternal rest has been disturbed. He walks the streets of Carroburg in the middle of the night, a translucent figure emitting a wailing shriek of anger as he calls for justice and revenge.

It is up to the Heroes to retrieve the sword and lay Karad's soul to rest. Even then, there is one last surprise in store...

[...]

The Sorcerer of Nurgle in the Ogre Chieftain's Stronghold is a member of the Jade College. He has the following spells: The Green Eye, The Pool of Many Places, The Cloak of Dainne and The Emerald Waterfall. He has enough material components to cast each spell once.