A hyper-realistic dark fantasy cinematic scene in 16:9 aspect ratio. A lone medieval knight stands in a black environment with soft shadows. The knight slowly walks forward for 2 seconds with detailed metallic armor reflecting subtle light. Then, in a quick and powerful motion, the knight raises his sword upward. As the sword reaches the top, intense electric blue lightning bursts from the tip, glowing brightly with sparks and energy waves. In the background, soft red rose petals fall gently in slow motion, creating contrast against the dark black environment. Ultra realistic textures, sharp focus, cinematic lighting, high detail armor, smooth animation. The animation is seamless loop: after the lightning fades, the knight smoothly returns to the initial walking position and repeats naturally. No abrupt cuts, perfect for looping wallpaper. 4K resolution, smooth motion, dark fantasy aesthetic.