Biomechanical dance of death inside a towering gothic cathedral, gargoyles fused with organic pipes and chrome, emerald-green bats with glowing neon wings, shafts of sickly green neon light piercing blackness, oozing black ichor, chrome and bone textures, intricate metallic ribcage vaulted ceiling, corpse-pale skin, photorealistic yet grotesque fleshy metallic fusion.