Really pretty useless NetHack wand
, rather like the scroll of light
. It lights up the room you are in.
The only times I've been marginally glad I had one were when I was groping about in a dark level of the Gnomish Mines...and even then, I could have done without it. I'll take a wand of death any day.
If you're into zapping random wands, you're in for a major disappointment.