DGFC, Dark Giger Flooded Crypt, dgfc_sarcophagus, monumental biomechanical sarcophagus chamber inside a flooded alien gothic crypt, massive black metallic coffin with opened engraved lid revealing a skeletal biomechanical humanoid body, intricate xenomorphic carvings and alien relief patterns across the sarcophagus surface, towering ribbed cathedral arches and dense organic cable structures fused into the walls, elongated biomechanical skull statues embedded into pillars and surrounding architecture, shallow reflective black water covering the floor with circular ripple formations, cracked wet stone pathway leading toward the sarcophagus platform, glowing cyan-blue spectral flames burning from organic biomechanical braziers, cold volumetric blue illumination reflecting across dark metallic surfaces, dense atmospheric haze, ultra-detailed biomechanical textures, symmetrical centered composition, deep perspective, oppressive sacred dark sci-fi atmosphere