A mostly-useless
NetHack amulet. When worn, it allows you to know the location and type of all
sentient creatures near you. It only works while
blind.
Polymorphing into a
metallivore and eating the
amulet is one way to gain
intrinsic telepathy, which is much more useful.
The Eye of the Aethiopica acts as an amulet of ESP, in addition to its other effects.