Mystic Oni Demon at the Waterfall

Discover a fantasy realm where nature meets mythology. This digital illustration brings to life an anthropomorphic oni demon, its horned mask concealing a face of mystery and power. The demon's green cape billows as it stands guard near the cascading waterfall, where ancient stone carvings whisper tales of old and the large rock formation adds an air of antiquity to the scene. Lush greenery surrounds the foreground, offering a stark contrast to the eerie presence of this mythical creature.