Demonic looking robot with fire coming out of its mouth in a city

Kaiju form of a human, sharp, obsidian-like plates that overlap like armor reptilian head, obsidian spikes running from the forehead to the back of the neck. Four glowing amber eyes, arms with massive claws and blades, feet have three large, taloned toes, A long, whip-like tail ending in a mace-like cluster of obsidian spike, orange lines and aura in between armor. HD. city background destroyed. ultra HD, masterpiece, 4k, 8k