A nightmarish depiction of an evil entity inspired by Japanese Oni culture, captured in portrait view. The artwork is highly detailed and rendered in 8k hyperrealistic style, akin to splash art and concept art. The face is intricately detailed and presented from a 2/3 angle, illuminated dramatically by side lighting, against a colorful and intricate background. The creature's features include a disfigured and slightly deformed visage with exaggerated characteristics that evoke fear. The design is intentionally unsettling with crooked lips, mismatched eyes, and a crooked face. The appearance includes possible extra limbs suggestively placed for effect, giving an unsettling and surreal feel. The composition maintains a high level of realism, despite the intentional distortions, without including poor anatomical features often found in draft work. The Oni's ghastly expression and presence are enhanced by its intense color depth, which draws the viewer into its haunting visage, creating a vivid nightmare brought vividly to life, devoid of unwanted elements like text, logos, or watermarks.