Nimpheleg believes it may be possible to end the corruption of the wilting rot within Buzun-ghâr.
'The rot that pervades the lower reaches of Buzun-ghâr is not of the natural world, ${PLAYER}, and that gives us the duty of removing it. If Orvar will not listen to our advice and seal the passage, we must destroy the source of the wilting rot before it escapes into wider Moria and becomes a much greater threat.
'I believe I have the means to do this, ${PLAYER}. This beryl will catch pure light, even at its most dim, and reflect it upon the corrupted walls of the passage. If you place it on a stone in the deepest area of Buzun-ghâr, it will be like a beacon to the evil of the rot -- drawing forth whatever lies behind the wilting rot, in agony.
'At that time you must destroy the source of the rot, but use caution! You must remain close to the beryl or its effects will not serve to weaken the master of the rot, whatever it may be!'
A stone on which to place Nimpheleg's beryl can be found in the deepest area of Buzun-ghâr.
Nimpheleg believes that you can draw out and defeat the source of the rot in Buzun-ghâr by placing a beryl on a stone in the depths of the cave. He warned you to stay near the beryl once you placed it, for only the stone will diminish the ferocity of the master of the rot.
Nimpheleg is at Lossathrod, the encampment in the upper reaches of Buzun-ghâr.
You have drawn forth and defeated the source of the rot within Buzun-ghâr, a diminished spirit: Grawulun the Caerog.