Bio-Drone

The Bio-Drone is a demonic alien weapon used during the Second Alien War. It is a brain, alien or human, that is housed within some sort of hovertank. Upon examination, it is shown that the brain has been heavily lobotomized, butchered into submission by the alien leaders. The drone's primary weapon, a powerful sonic disruptor, is based off the voice of the brain's former body, meaning that it literally screams at its enemies to death. Like most alien weapons and races in the Second War, it is amphibious. Bio-Drones are easy to track, because they leave scorch marks when they move.