Dark fantasy scene, medieval ruins, crumbling castle walls, twisted roots, ominous mist, eerie red moonlight, glowing eyes in darkness, demonic creature emerging from shadows, horror-inspired, detailed gruesome skin texture, ripped flesh, bony fingers, horns, scales, skulls, bones, ancient mysterious artifacts scattered around, Celtic knot patterns on stone floors, mysterious runes etched into walls, cryptic symbols on ancient tomes, dramatic high-contrast lighting, dark blues and reds dominant color palette, haunting atmosphere, intense composition, 3D rendering.