A gigantic floating cuboid structure with dark, twisting tentacles

A gigantic floating cuboid structure with dark, twisting tentacles, radiating an intense green light from the circular patterns and eyes with illuminated symbols embedded in their faces. The scene has a dark and futuristic atmosphere., with a greenish-yellow lighting that envelops the entire space, full of geometric shapes and blocks suspended in the air. Two tiny, zombified figures appear to be wandering in front of this monstrous entity., highlighting its colossal scale. The atmosphere is oppressive and mysterious., as if the place were a prison or a temple of some cosmic deity. The style is a combination of science fiction and cosmic horror, with intricate details and a sense of alien grandeur.