Eye of the Beholder

The Eye of the Beholder is the reward for the Neutral Quest in SLASH'EM, along with the Key of Neutrality. It provides no effects when carried or wielded, but has some (rather nasty) effects when invoked. Eating it will cause you to 'feel a burning inside' and take 150-199 points of damage, so that is probably a bad idea.

Generation
As with the other two alignment quest artifacts, you must kill the Beholder in such a manner as to leave a corpse in order to obtain the Eye.

Invoking
Invoking the Eye has two possible effects: If your luck is less than -9, then and you die instantly. Else, and all non-undead monsters that can see you are reduced to 1/3 of their remaining hitpoints. This will never kill any monsters directly. This has the further effect of reducing your alignment record and Luck by 3 each.
 * "The Eye turns on you!"
 * "The Eye looks around with its icy gaze!"

Strategy
In general, this is the weakest of the alignment quest artifacts, given that it has no use other than its invocation, which is a somewhat mixed effect at best. Still, it could be useful for clearing out special rooms such as zoos and throne rooms, although one should make sure to light up the room beforehand.