The Great Elder Brain
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Within the confines of the Orion Solar System, a large colony of nautilus-shaped spaceships floated above a vast planet with wet and warm temperatures… Within this planet of swamps and jungles, there was an immense subterranean metropolis, the Mindflayer Metropolis!
In this paradise of grotesque brain-eaters, all of the Mindflayers that were born in here that were sent outside to gather resources ad knowledge would gather here once every 5 years, making up the council.
High Mindflayers would lead the council, often called Elders. The strongest Mindflayers who by chance, parasitized a talented host as a tadpole and transformed it into a High Mindflayer were cataloged as a higher caste. They were seen as natural leaders and as powerful Psionic Sorcerers.