Overmind

The Overmind is the omniscient sapience that functions as the collective brain of The Congregation. It is a massive fungal structure with heightened psionic abilities, which allow it to retain control of a hivemind of trillions of thralls, which it refers to as scions. The Overmind spreads itself through spores, which enter the brains of its victims and hijack them, giving the Overmind complete and total control of the nervous system, which is how it enthralls species.

It feeds upon consciousness exclusively, which means that it must supplant other species and drain their minds in order to keep itself at full power. This process always results in the complete extinction of the supplanted species. This constant craving for food, coupled with its own narcissicism and inability to understand or sympathize with what it refers to as "mortals" is what drives the Overmind, and therefore The Congregation, to spread throughout the galaxy and feed. It is feared by all, and its trillions of scions, sometimes referred to as the Congregate Hordes, are viewed as a scourge upon the galaxy.

Physicially, the Overmind is fungal in nature, and consists almost entirely of psionic neural tissue, which grants it extreme intelligence, the likes of which has never been seen in the billions of years that it has existed.