A nightmarish visual of an evil entity inspired by Japanese Oni culture, presented in a hyperrealistic, highly detailed 8k portrait view. The scene is a dramatic mid shot, showcasing an intricately detailed 2/3 face angle with striking side lighting. The background bursts with color depth, enhancing the eerie atmosphere. The entity bears a disturbing appearance, with a disfigured and deformed visage, possessing mismatched eyes and a crooked expression. Its anatomy is unsettling, featuring extra limbs, poorly drawn hands and feet, and bizarre body positions, creating an unsettling silhouette. Despite its realistic rendering, there are elements of imperfection, like grainy textures, blurred lines, and faint markings reminiscent of watermarks and signatures. The composition swirls with ethereal chaos, with an off-center focus leading to an unclear, dreamlike quality, emphasizing the nightmarish essence.