Monstar Virus

The Monstar Virus was an infection designed by Wilhelm Ryan and created by Leonard Hohenberger who modified it. The virus was ultimately the cause of the separation of Sector 12 from Heaven's Fence. It was falsely believed to have mutated into the Sinstar Virus, but this was a lie. It may be related to the Aeonstar Virus, but there is not quite enough information yet to be sure.

Development & Purpose
After the appearance of the Black Rainbow, Ryan had his United Red Army scientists begin to work on a virus that could be introduced to the Keywork which would destroy all life on the Fence. It was intended to consume the energies when in contact with the network. As a network, it was theorized that it would then spread to each world, eventually reaching all lifeforms which would be snuffed out. His scientists couldn't quite figure out how to achieve the virulence needed to caused the devastation he desired. For this reason, upon learning Dr. Leonard Hohenberger was the figure behind KBI and his background in human biology, Ryan's forces kidnapped Hohenberger's wife and forced him to successfully complete the formula on their behalf.

Modifications
Hohenberger agreed to do as they wished, but subverted their expectations by splitting the virus into two components. As Ryan also wanted Beast and Knowledge of KBI, Hohenberger put these components into each of them, effectively keeping the virus out of reach for Ryan, and accomplishing his ransom all the same. In being separated, Beast held the compound that would make disease virulent, while Knowledge contained the core of the disease itself. Hohenberger also warned Ryan's men that if they attempted to kill Beast, the component, exposed to the air, would be dissolved, while if anything happened to Knowledge, any and all nearby would be exposed to the virus and instantly die.

Cache Serum
With the new information and situation, Ryan had to figure out how to still use his virus, but clearly, his plan would have to be modified to achieve his goal. Having all of Hohenberger's notes, he worked with his scientists and developed the Cache Serum. He was successful in having this completed and worked with an animal biologist to modify dragonflies to hold the serum in the abdomen, which would have a stinger component instead. This serum interacted with the virus components in Beast and Knowledge's blood to transform them into the Monstar and White Ruineer, respectively.

Separation of Sector 12
The Monstar gave off vapors of the original virus, though only those in the immediate vicinity were effected by them. He propelled himself through the atmosphere to land on the nearest Star, Star VI, where the vapors rapidly interacted with its gases and caused it to die, leaving only a harden core. The power to the Keywork disrupted, the Star and its nearest planets (the ones belonging to Sector 12), disconnected from the colony and drifted into space.

The White Ruineer followed the Monstar and though she was too late to stop him from killing the Star, she stopped him from doing more damaged by stabbing him through the heart with her blade. Upon dying, the Monstar reverted back to his original form of Coheed Kilgannon. Similarly, with the threat over, the Ruineer reverted back to her original form of Cambria Kilgannon, and upon seeing that she had, in fact, killed her husband, stabbed herself in the throat to join him in death. Before her dying breath, she used the last of her physic powers to reignite the Star which pulled the separated planets into a new system, stabilizing them.

The rest of the Fence remained unstable as though the separation was rip to it that sent a ripple of pain throughout the colony. The Prise were fighting on Paris: Earth which was separated, and left the planet to go to the ripped edges of the Keywork. They linked hands and gave up their energy to stabilize the tear. As though a bandage had been put on it, the Keywork did indeed stabilize.

Aeonstar Virus
There may a connection from the Monstar Virus to the Aeonstar Virus. Preliminary understanding of the Aeonstar one is that it interacts with a person's soul to transform it into a monstrous form, much in the same way the Monstar one did. It may be a true, lab mutation of the original, but this is unclear right now. A temporary vaccine does exist, which was administered to his men to prevent the instant death the virus causes, but upon their death will still initiate the transformation.

Trivia

 * The 9 planets in Sector 12 that were separated from the Fence were then renamed "Silent Earths" with each planet closest to Star VI in orbit being given a corresponding number. For example, Paris: Earth, now third from Star VI in its new orbit, became Silent Earth: 3.