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 takes off and flies upward, majestically and forcefully beating his gargantuan black feathered wings. The entire sky above is already wrapped in absolute, pitch-black twilight and deep shadow. Below him, a massive medieval stone city is being completely torn apart by an immediate cataclysm, glowing rivers of bright orange molten lava cut violently through the streets, melting buildings and collapsing walls. Raging flames consume the ruins. 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 as he ascends over the burning city. High physical vertical motion, heavy smoke, flying embers, photo-realistic, 8K resolution.