A ring of silver enchanted such that if any in the wearer's presence intend to harm them it would grow warm. Unfortunately it's properties are wasted if in place of politics where it is consistently warm.
A land is reigned by a circle of powerful men who control every aspect of the citizen's life. This cabal changes members often. In reality, the spectres of a small necromantic covent possess and control the people in power. Since they simply possess the bodies, they can leave when old age overcomes their shells and possess a new up-and-coming noble.