A couple of items adapted from Paul Kemp's Egil and Nix novels:
The Illuminating Eye (1 weight)
A crystal sphere that contains a mystical eye. When commanded to open by its owner the sphere acts like a Light spell the illumination but also reveals secret doors, traps, invisible creatures or objects and illusions.
The Devouring Key (0 weight)
This key will open any lock or door (magic or not) if the key's owner rolls 10+. A 7-9 and the key requires a food ration to open the door. On a fail the key will demand an expensive and rare fruit or vegetable to open the lock. If the owner agrees the key will open the lock but will not function again until it receives the promised gourmet item.