A dark colossal built as a futurist...

A dark colossal built as a futuristic megastructure of interconnected spheres. Three massive hollow spheres are stacked vertically around a glowing central reactor beam, with multiple smaller satellite spheres connected by glass tunnels and mechanical arms. The structure features dark industrial architecture, exposed machinery, alien technology, cyan and purple energy lighting, and intricate sci-fi detailing. The interior is fully functional as a survival megabase with automated farms, storage, trading halls, research facilities, and a central AI core chamber. The design is perfectly symmetrical and resembles an ancient extraterrestrial Dyson-sphere command center suspended above a void.