A massive, ancient tree with a trunk naturally shaped into a terrifying, realistic human skull. The roots resemble giant bones, and the upper branches are gnarled and leafless, like skeletal fingers clawing at the sky. The eyes are hollow sockets glowing with a faint, ghostly blue light. Setting: a foggy, Victorian-style graveyard under a full moon, cinematic dark fantasy style, 8k resolution, hyper-realistic textures.