Infernal Sphere

The Infernal Sphere was a vast Dyson sphere built around an ancient black hole. It was the homeworld and laboratory of a demonic race of god-like scientists.

Keeping with the aesthetic of its masters, the Infernal Sphere was reminiscent of the common perception of Hell. It was full of "limitless darkness," and the black hole at its center spun above a iron landscape of fire and occasional screaming. The atmosphere tasted of metal and blood.

The Infernal Sphere was the location where Lady Thelema murdered Prince Baphomet and his concubine Byzo. (PROSE: T.memeticus: A Morphology)

Behind the scenes

 * Simon Bucher-Jones' Doctor Who and the Exile from Hell, published in the Obverse Books charity anthology A Second Target for Tommy, features the Daemons and references the Infernal Sphere.
 * The Sphere can be seen as a twisted reflection of the People's Worldsphere, the latter being the "Heaven" to the former's "Hell".