assassin in a robe, malevolent aura, unleashing a slash with a sword, dark setting, sinister, glowing eyes, hooded cloak, detailed, intense expression, shadowy, mysterious, vibrant colors, magical, anime style, intricate patterns, dark magic, fantasy setting, night, moonlight, dynamic pose, menacing, grim, ethereal, haunting, enchanted, glowing symbols, eerie, dangerous, foreboding, dark fantasy, evil presence, swirling energy, detailed background, dramatic lighting