Colossal Obsidian Monster in Haunted Graveyard

A colossal, terrifying monster made of cracked obsidian and dark stone stands in a haunted graveyard at night. The creature has glowing orange eyes, jagged teeth, and large curved horns on its head. Its skin is textured like volcanic rock with veins of molten lava glowing beneath the surface. It has massive claws on its hands and feet. The background features a gothic cathedral ruin, twisted bare trees, fog rolling across the ground, and numerous carved jack-o'-lanterns emitting an eerie orange glow. A full moon shines brightly through the clouds in the upper right sky. The lighting is dramatic, with strong rim lighting from the moon and warm under-lighting from the pumpkins. Cinematic composition, low angle shot looking up at the beast, highly detailed, photorealistic CGI style.