The Brain Sucker is like the ugly brother of the Drain Deimos. It was also a flea but it fed on a different animal, which lead to a different mutation. The monster has two heads and walks on five legs and as its name implies likes to feed on brains.

The Brain suckers main form of attack is its toxic venom it spews out upon its prey. It then jumps at the prey and destroys its skull with its claws. Once the skull is opened it will insert its two tongues and eat away at the brain. Not a way Jill would want to die, she fought these monsters as well on her escape.