Hallucination
Very much like real life, hallucination will cause you to see things that are not there. Hallucination changes the appearance of both monsters and objects. You can easily cure hallucination with a unihorn.
Any objects will be seen as continually changing items of the same class, so a pick-axe may be seen as a sack, key, but not as a sword. The most dangerous thing about hallucination is that it conceals what the actual monster is. For instance, "I see a fungus over there, I'll kill it real easy. Whack, whack. (Fungus replies) WHACK! DYWYPI? Foo, killed by a hallucinogen-distorted soldier ant."
There are a few different ways to hallucinate:
- eat the corpse of a yellow mold or violet fungus
- let a black light explode on you
- quaff a potion of hallucination
Hallucination can be cured by
- applying an uncursed unicorn horn
- quaffing a potion of sickness, potion of extra healing or potion of full healing
- praying
- just waiting it out
Hallucination also prevents dying to a monster's touch of death.