Fiend

@ fiend
Attacks	Weapon 1d6 physical

@ fiend
Attacks	Weapon 1d6 physical
Base level	5
Speed	10
Base AC	10
Base MR	10
Alignment	3 (lawful)
Frequency (by normal means)	Not randomly generated
Genocidable	No
Weight	1450
Nutritional value	400
Size	Medium
Resistances	Poison
Resistances conveyed	Poison
A fiend: has a head, a couple of arms, and a torso. is omnivorous. is not a valid polymorphable form. is a human. is normally generated peaceful. is strong. can pick up weapons and food. hits creatures as a +1 weapon.
Reference	SLASH 6 monst.c#line3880

Fiends are the quest guardians of the defunct Lycanthrope quest from NetHack Plus and SLASH 6.

There is also a Slash'EM Extended starting race called the "Fiend", which does not appear to be related.