Hogwarts castle, dark arts theme, sinister atmosphere, moonlit sky, eerie lighting, floating candles, ancient stone walls, magical runes, wizard student, Slytherin uniform, wand in hand, casting dark spell, green energy swirls, black robes with silver trim, intense gaze, determined posture, serpent emblem, potion bottles, dusty spellbooks, cobweb corners, dungeon setting, torch-lit corridors, 3/4 view, dynamic angle, high contrast shadows, immersive environment, gothic architecture, velvet textures, intricate patterns, ambient occlusion, magical glow effects, cinematic shot.