This item belongs to the very small class of magical items that would be very good In Real Life, but are very bad in NetHack (others include the amulet of change and potions of hallucination). When the amulet is first put on, you will fall asleep in 1 to 100 turns, awakening 1 to 20 turns later or when disturbed. The cycle then repeats.

Considering that monsters get free hits on you while you're asleep or unconscious, this amulet is definitely hazardous to your health. Furthermore, it's usually generated cursed, which doesn't help matters any. The amulet has an amusing tendency to put you to sleep as you are about to remove it.

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