DNA replication module

A DNA replication module was a technology that could cause damage from afar or control a person's actions. It required a tissue sample, such as a hair, to work.

By 1599, when the Tenth Doctor met them, the Carrionites were using the technology in the form of a doll, most likely the influence of tales of the voodoo doll, in order to kill their victims. The Carrionites themselves did not call it this, but the Tenth Doctor recognised it for what it was. (TV: The Shakespeare Code)