The Xindi-Reptilian biorifle weapon is an example of biotechnology, a rifle-type energy weapon. The power cell is a lifeform resembling an eel. Its neural pathways modulate the rifle's power output; Doctor Phlox considered it the most sophisticated example of biomechanical engineering he had ever seen. If the organism is removed from the weapon, a new one grows almost immediately to replace it, making it very difficult to disarm such a weapon. The organism can be killed with a sustained burst of delta radiation. Omicron radiation, however, causes the organism to thrive. (ENT: "The Shipment")