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.

Restore ability potions can (partially?) cure amnesia effects.

You can pay a shopkeeper a small fee to go take an item from the floor of his shop and deliver it to you, so that you avoid running into mimics getting it yourself.