Eating an amulet of reflection (which doesn’t provide any intrinsic) causes you to “reflect on your inner self”, providing enlightenment.

A cursed amulet of reflection will behave as an “amulet of absorption”: instead of reflecting rays, nearby ones that weren’t going to hit you get redirected towards you instead. Also, rays that hit an amulet of absorption wearer don’t continue past them.

Alternatively, add the amulet of absorption as its own item, and make it usually generate cursed like other “bad” amulets.