Nagrorh

Nagrorh is a necromancer that lives near Greenholm. He's an aggressive level ? mob. He can cast Sanctuary and Lightning Bolt as well as a spell that summons spectres to defend him. He tracks within his two rooms, and any summoned spectres will follow him. He loads 5 gold, an enruned robe, a mace and the black bone key that unlocks the door south of the room where he spawns. The room contains a chest with either a broadsword or large metal full shield in it.

Nagrorh the Abomination is looking at you with flaming red eyes.
>examine Nagrorh
Gaunt and skeletal in form. Nagrorh's eye sockets are black and empty save for
the fierce pinpoints of light which serve him as eyes.  Garbed in rich clothes
of nobility, an aura of cold and darkness radiates from him, an ominous and
fearsome sight. The magic contained in him overwhelms everything...

Strategy

He can be dealt with pretty easily by a hero+ thief - simply backstab/escape until he's dead. A tip - if he casts sanc when you enter his room, but doesn't immediately attack, just go west (he doesn't track if you haven't engaged him in combat) and wait out the sanc - makes killing him a lot faster, as he doesn't re-sanc often.