A potion of hallucination can be quaffed to cause hallucination; blessed potions cause you to hallucinate for fewer turns (300-499), uncursed for a medium number (600-799), and cursed for a long time (900-1099). Potions of hallucination have a base cost of 100 and can be turned into water by #dipping a unicorn horn in them. Vapors from this potion are harmless and give the message "You have a momentary vision."