Demon Boy of the Sea

Upon the pitch-black night sea, a silver-haired demon boy stands bare-chested upon the shallow water's surface, clutching a cyan-blue glowing demon blade while gazing straight ahead. A pair of black horns rise from his head, curving sharply toward the night sky, while cyan-blue energy emanates from his forehead, illuminating his face and chest. His silver-white hair whips dynamically in the wind and magical force, as cyan-blue rune patterns glow across his bare torso, revealing his demonic awakening. He wears black harem pants with a leather belt wrapped around his waist, and cyan-hued patterns shine upon his legs as well. The entire blade of the demon sword in his hand blazes with cyan-blue energy, inscribed with diamond-shaped rune markings. Ripples spread across the black sea beneath his feet, cyan light reflecting upon the water, as white waves distantly break faintly through the darkness. This dark fantasy illustration captures a lonely, dangerous moment of the demon boy standing upon the night sea through the mystical palette of deep navy and cyan-blue.