Necromantic bells are the tools or weapons wielded by a necromancer. There are seven bells, each named after one of the Seven who created the Charter. It can be inferred that ringing each invokes the power of the associated Seven, but this is not directly mentioned in the series. The bells generally grow more difficult to wield properly as their size and power increase, and they usually have a negative effect to the wielder if used without proper care. The bells are described as typically being worn and stored in pouches on a bandolier.