Scub Coral

The Scub Coral is an extraterrestrial life form which arrived on Earth as a meteorite and gradually grew to cover the entire planet while fusing with and absorbing its biosphere. As a massive superorganism, it can create mobile units such as the destructive Antibody Coralians, the giant humanoid Archetypes, and the Humanoid Coralians created specifically to communicate and interact with Humans.

The invisible atmospheric phenomenon known as transparence light particles, or trapar, is produced by the Scub Coral as a result of its mental activity.

Antibody Coralians
Antibody Coralians are flying cyclopean creatures which come in variable sizes and shapes. Each has a single eye with a purple iris. They form huge swarms and attack indiscriminately. Being a protective biological response, it appears that the Scub Coral has little to no conscious control over the Antibodies. They live for only 1246 seconds (20 minutes 46 seconds).

Humanoid Coralians
Humanoid Coralians look and act completely Human, although at least some of them are known to have unusual hair colors such as green or purple. They can be identified by their eyes, which have the same purple irises as the Antibodies. Created as emissaries to live among humanity, Humanoid Coralians are even genetically compatible with Humans.

History
The Scub Coral arrived on 21st century Earth as a small object, which collided with a rocket and fell into the ocean, where it first achieved sapience. It's not aware of its own origins prior to its arrival on Earth.

Once on the ocean floor, the Scub Coral started to grow by fusing itself with every living thing it came across, doing so because fusion was the only form of communication it could conceive of. Soon it spread throughout the planet, forcing Humans to abandon their world, as the alien fused itself with every remaining life form and covered the Earth's entire surface.

During the next millennia, the Scub Coral remained alone with nothing else to "communicate" with. Reflecting on its condition, it started to comprehend the possibility of coexistence, as opposed to assimilation. When the Humans returned, the Scub Coral was eager to try to establish communication in a non-invasive way, and thus, in an attempt to understand Humans and communicate with them, it created the Humanoid Coralians.

About 7,000 years after the Scub Coral became sapient, the Limit of Life (a.k.a. the Limit of Questions) was reached, meaning that the sheer amount of mental activity accumulated by the Scub Coral exceeded the limits of what would be allowed by quantum physics and threatened to tear a hole in the universe. The Scub Coral managed to avoid this disaster by going into almost complete hibernation for the next three millennia.