Shayn's Infallible Identification

With this spell, the caster creates a link between an object and its owner. A line of magical force, visible only to the caster, connects the object to one part of its owner's body, usually the head or heart. The line winks out if the object is taken more than three feet from the owner, but automatically reappears when the object comes within range, provided the spell's duration hasn't expired. The line can be seen with detect magic, detect invisibility, true seeing, or a robe of eyes.

The material component is a long piece of thread coated with glue at both ends.