A high-quality 3D portrait rendering of a ghoul standing as the sentinel of Hell's gates, featuring a burning skull with intense, flickering red eyes. Its slender, towering body showcases an intricately detailed skeleton draped in tattered, shadowy rags. The background is engulfed in an inferno of highly detailed flames, exuding a dark fantasy horror ambiance with rich red, dramatic, and cinematic lighting. The atmosphere is reminiscent of an artstation masterpiece, with a soft-focus effect that enhances the depth of field, capturing an eerie, otherworldly essence. The ghoul's face is devoid of horns, eyes, nose, and hair, adding to its ghostly, skeletal appearance.