Dark fantasy world setting. A young boy character with fluff...

Dark fantasy world setting. A young boy character with fluffy, waist-length hair in a deep blue gradient (ends glowing with a dark purple luster). His gilded vertical pupils have a cold gaze. In his palm, he holds a pulsing ethereal blue soul-fire (entwined with black demonic patterns). Purple lightning patterns roam around his body, piercing the darkness. He wears distressed black leather armor (inlaid with silver magic runes and metal rivets) with worn dark carvings on the edges. The background features the ruins of a Gothic magical castle split by lightning, with dark purple magical mist and shattered magical crystals floating in the air. Swarms of bats fly across the night sky. 8K ultra-high definition, cinematic fantasy lighting, high-contrast dark tones of blue, purple, and black, with distinct layers of magical effects.