A formidable demonic knight stands tall with a commanding presence, her long, voluminous ink-black hair cascading down her shoulders in messy, textured layers that frame her face and curved horns. She is encased in ornate, obsidian-colored plate armor featuring a glossy finish, sharp filigree, and glowing red gemstones, paired with tattered dark fabric around her waist and intricate greaves. Her pose is a low-angle power stance: her right hand is raised high to grip the hilt of a massive, glowing greatsword that rests vertically on the ground in front of her, while her left arm hangs slightly away from her body with her hand partially curled. Her head is tilted downward, allowing her glowing red eyes to pierce forward from beneath her bangs, and her legs are spread firmly to support her weight. The scene is set within a gloomy, Gothic cathedral with towering arched windows and skeletal stone pillars, where dim, cold light filters in from behind her to create a sharp silhouette. This low-angle perspective emphasizes her towering stature, making her appear heroic and menacing as embers and fog swirl around her feet.