Weapon Bonding (Eternus)
Weapon bonding: Weapon Bonding is a magical power that can be performed by the sheriff of a territory or his charges. It is a way to keep a weapon from being easily used while you are in a town.
The power is activated by a medallion and which casts a simple spell a weapon attaching it to a sheath or other item so it can't be pulled without it taking one round. If the weapon is pulled the person or person containing the amulets used in the power can instantly tell that the bond has been broken and can use the amulet to determine the location of the weapon in question. The minute that the weapon leaves town the power disappears