Pocketknife from the Isabella Stewart Gardner Museum Art Theft

Origin
The Isabella Stewart Gardner Museum is a famous art museum in Boston, Massachusets. The museum houses an art collection of world importance, including significant examples of European, Asian, and American art, from paintings and sculpture to tapestries and decorative arts. In 1990, thirteen of the museum's works were stolen; the high-profile crime remains unsolved and the artwork's location is still unknown.

Effect
The knife was one used during the theft. When held, the user will be compelled to steal expensive objects.