Retro sci-fi pulp style, cosmic horror, monstrous robotic entity emerges from interdimensional portal, surrounded by the remnants of fallen civilizations and otherworldly phenomena, tentacle-like cables, reality-warping effects, eldritch symbols, chaotic scene with swirling energy vortex, cosmic void with floating debris, vibrant alien sun backlighting, eerie color shifts, bold contrasting color palette.

Otherworldly alien city by night, on an unworldly planet and galaxy, with extraterrestrial monumental architecture never seen before.