An epic dark fantasy animation video of an apocalyptic catastrophe. A colossal, giant Dark Angel with a deeply sad, melancholic face and very long, flowing slate-grey hair is majestically hovering and flying over a ruined city. He is continuously and forcefully beating his gargantuan black feathered wings to maintain his flight high in the air. He wears dark, ancient gothic black iron armor. The entire sky above is wrapped in absolute, pitch-black twilight and deep shadow. Directly below him, a massive medieval stone city is being completely torn apart by a cataclysm, glowing rivers of bright orange molten lava cut violently through the streets, melting buildings and collapsing walls, while raging flames consume the ruins. The camera slowly tracks his majestic flight as the landscape of lava and destruction flows underneath. The only light in the entire scene is the violent, flickering glow from the lava and fires, casting a dramatic, harsh upward firelight onto his sorrowful face, his long grey hair, and his beating wings. High physical wing-beating motion, heavy smoke, flying embers, photo-realistic, 8K resolution.