Devourer

The Devourers are a malevolent race of eldritch, extra-dimensional creatures which are spawned from the void beyond existence and dwell outside the Omniverse. It is not known how they came to be, but the prevailing theory is that they spontaneously formed from the chaotic essence of the void itself, likened to the ‘Boltzmann Brain’ thought experiment in quantum physics. Their natural form in the void is that of a dark, gelatinous orb of shifting colors and orange blinking eyes, with tendrils in various lengths and sizes sprouting from their writhing core. They spend most of their time in eternal hibernation, drifting aimlessly within the endless emptiness and occasionally feeding upon the ambient non-energies throughout their home. With the creation of the Omniverse, the Devourers were awakened from their slumber, and the very nature of existence which radiated into the void was causing them great pain, leaving them unable to return to the sleep they knew for aeons. They had now discovered a new purpose with their awakening: To corrupt and ultimately consume all life and matter within the Omniverse, and ensure that the void may once again reign uncontested for all eternity.

After bringing the Omniverse into existence, the Supreme Creator also went to great lengths to keep the Devourers from entering and spreading their corruption by erecting a barrier between reality and the void of non-existence. Despite the presence of this barrier that is able to keep most adult Devourers from entering, younger Devourers are still been able to clandestinely slip through the small cracks in this barrier like cosmic cockroaches, due to their diminutive size and much weaker status. To this end, an entire new generation of Devourers was birthed with the specific purpose of venturing into the fabric of reality and choosing a universe to infect with their presence. Once inside the universe of their choosing, these creatures normally invade habitable planets in the guise of meteors falling into the planet's gravity well, and upon impacting into their targeted world, they will quickly burrow beneath the surface and embed themselves in the planet's core. Most impacts caused by the Devourers tend to result in mass extinction events for all life upon it, such as in the case of Earth and the arrival of its Devourer approximately 65 million years ago, which was responsible for the extinction of the dinosaurs.