Vurosis

The Vurosis was a type of parasitic lifeform.

Biology
Despite its appearance, the Vurosis was neither a plant or an animal, being unlike any Earth life and being immune from any Earth-based toxins. The Vurosis' main body was composed of a system of interlocking white roots. Though they grew haphazardly, they could later be grown in specific patterns and organizations. Many of these roots had black eyes. These roots were warm to the touch and glowed green in the dark.

The Vurosis' brain was a small, stone-like structure, about the size of a human heart. It could be separated from the main body, but the intelligence of the Vurosis would decrease. The brain was capable of telepathically communicating with other individuals, as well as physically and mentally modifying them. It could also grow tendrils to manipulate its environment. The brain would also give off radiation that would eventually become fatal.

The Vurosis could telepathically modify other carbon-based life. When modified, the individual would grow tendrils throughout their body and would take on the bioluminescent glow of the Vurosis. These modified individuals would be loyal to the Vurosis and would do its biding while it was stuck underground. The mutations could also be overloaded, killing the individual and turning them into dust. (NSA: Wishing Well)

Life Cycle
The Vurosis begins life as a seed, which sets root on a planet with carbon-based life. The Vurosis grows underground for hundreds of years, spreading its tendrils throughout the area.


 * How they get from another planet from the Actron Pleiades system is unknown. Possibly, they can travel through space like the krynoids.

The Vurosis eventually reaches maturity in a process called The Rising. This occurs when the brain is brought to the main body. The brain will attempt to bring itself closer to the body of the Vurosis, modifying the minds of people around it so that their objectives matched. Until the brain is reunited, both the brain and the body will have limited abilities, with the body doing little more than reacting to its environment.

Once the Vurosis obtains its brain, it reaches its final stage of development. The main body will form into a massive, worm-like structure and bring itself to the surface. The tendrils underground will spread out and engulf any living creatures for energy. At this stage, it is still weak, since it needs all the energy it has in order to grow. Eventually, it will have enough energy and will then spread its roots out further, reproducing as it goes. At that point, it is nearly impossible to kill, as any remaining sections will be able to regrow the whole body. (NSA: Wishing Well)

History
At some point, a Vurosis was brought to the wishing well in Creighton Mere. It began to grow for hundreds of years, filling the well and becoming interlaced with the nearby soil.

In 1902, Rupert Gaskin started construction on the Gaskin Tunnel, believing that there was treasure at the bottom of the well. Though he reached nearly to the body of the Vurosis, he died from influenza and the construction was stopped. In 1943, Nigel Carson's grandfather found the tunnel and explored it further. He was able to find the brain, and took it for himself. Though he wanted to go back and find this "treasure", he eentually succumb to the radiation from the brain. Eventually, the brain was passed on to Nigel Carson, who was able to get together a team to dig. They eventually broke through and Duncan Goode was taken over by the Vurosis. Using the body of Duncan, it hunted down Nigel and tried to take back the brain. After conflicts with the Doctor, the Vurosis took back the brain to the well. Though the Vurosis was awakened, the Tenth Doctor was able to force its mutagenic powers back on it, killing it. (NSA: Wishing Well)