Nalzok, &, is the Priest quest nemesis. He is almost identical to the Archeologist quest nemesis. The only differences are that he's more strongly chaotic (which means that chaotic priests will get a smaller alignment record bonus from killing him than will cross-aligned priests) and his slightly higher MR. As a major demon, Nalzok hates silver and respects Elbereth.
A user has suggested improving this page or section as follows:
"Most of the information is adapted from the Arc quest nemesis article. Could do with better adaptation."
Since Nalzok is almost identical to the Archeologist quest nemesis, some of the strategies that apply there will also apply to him. Since he is a demon, wielding a blessed silver weapon is very effective.
Not only is he capable of summoning more, but he also does the "teleport away" defense, like demon lords in Gehennom and other Quest nemeses. If you can go toe-to-toe with him (which, by level 14, you should have decent armor AC -15 and good weapon) you should engage him, then go stand on the up staircase. Elbereth may also come in handy.
Nalzok is Moloch's cunning and unfailingly loyal battle
lieutenant, to whom he trusts the command of warfare when he
does not wish to exercise it himself. Nalzok is a major
demon, known to command the undead. He is hungry for power,
and secretly covets Moloch's position. Moloch doesn't trust
him, but, trusting his own power enough, chooses to allow
Nalzok his position because he is useful.