Mytopia is the underground city of the Myconids - a race of intelligent mushroom-like people that have been hidden away from humanoids for centuries. They are distrustful of outsiders, and live in a near idealized socialist civilization, as they are born subservient to their kind by nature.
The civilization is led by the Elderspore - an old Myconid that is able to commune with the "Root Mother" Izhun.