A spectral and sinister Shrek stands in a dark swamp, his head tilted with glowing, soulless eyes. His green skin is slick with slime and smeared with traces of blood. His figure is partially shrouded by mist and shadow, his expression a haunting blend of anguish and malice. The atmosphere is chilling, with cold blue-green hues, unsettling, surrounded by decaying vegetation, full-body view, horror scene, muted gray tones.