Black light

y black light
Difficulty	7
Attacks	Explode hallucinate

y black light
Difficulty	7
Attacks	Explode hallucinate
Base level	5
Base experience	73
Speed	15
Base AC	0
Base MR	0
Alignment	0 (neutral)
Frequency (by normal means)	Rare
Genocidable	Yes
Weight	0
Nutritional value	0
Size	Small
Resistances	Fire, Cold, Shock, Disintegration, Sleep, Poison, Acid, Stoning
Resistances conveyed	None
A black light: can fly. can flow under doors. does not breathe. cannot pick up items. has no eyes. has no limbs. has no head. is mindless. does not have a solid form. can see invisible creatures. does not eat. (*) is neither male nor female. is normally generated hostile. never leaves a corpse.
Reference	monst.c#line1047

A black light will explode when you are adjacent to it, causing you to hallucinate, but causing no other damage. The hallucination will last for 10d12 turns.

Strategy

The best course of action is to put on a blindfold or towel and wait for it to explode, or to have a potion of full healing handy.

Encyclopedia entry

Strange creatures formed from energy rather than matter,
lights are given to self-destructive behavior when battling
foes.