Amulet of Introspection
This inconspicious amulet has profound effects on the wearer - while it saps physical strenght and attributes to a degree that makes even moving around hard, it helps to achieve a trancelike state said to strenghten mind and soul of the wearer, giving great insights into the nature of the universe
I would love to see this used in a story.
I plan to flesh out the amulet at some point and I'm pretty sure you will see a story then.