An unstrung and useless piece of cold wood, unless you happen to be dead.
A tiny marble cherry with an amber heart inlaid. One of the Lolliful Avenger's most devastatingly effective weapons.
A planet (or city, valley ect) where those who enter witness protection can escape old age and death itself, so they can live for centuries without aging-provided they maintain their cover perfectly. If they are outed by anyone or ever utter their true name, they age the number of years they have not aged since the day they entered witness protection (which might mean that they age centuries in seconds and crumble into dust and bone.)