Skull owl, dark fantasy creature from Aventuria, eerie and mystical, massive owl in mid-flight with wings fully spread, dynamic motion, descending through a foggy forest, skull-like face with glowing hollow eyes, bone textures seamlessly blending into dark feathers, sharp talons extended, moonlight casting cold blue highlights across wings and body, swirling mist around it, twisted dead trees below, gothic atmosphere, cinematic lighting, ultra-detailed feathers and bone structure, deep shadows, fantasy realism, artstation quality, 8k