The throne room of the Empress. Several powerful psionics feed the 'psi' pool surrounding the throne. Thanks to the constant energy flow, the Empress can 'monitor' the thoughts of every single citizen in the kingdom, efficiently preventing any resistance groups from being formed. It also allows her to find a potential candidates for her troops. Psionic energy can also be utilized for attack/defense, though apart from psionics and Executioners, it's forbidden to be used by ordinary people.
A concept for my personal project called 'Absolutum'. The story takes place in a futuristic fantasy-like kingdom in totalitarian setting. The world, full of bio-engineering, meta-alchemy and psionics is ruled by the Empress, a quasi-immortal with powerful psychic powers thanks to her longevity and numerous mutations. The magical substance called Arcalum is the base of her power. Arcalum is used to run machinery and weaponry developed by royal meta-alchemists as well as a high-energy fuel source used in air-fregates. The rule of the Empress is eternal and unthreatened. Or so it seems.