A spectral and sinister Shrek stands in a shadowy swamp, his head tilted with bright, hollow eyes resembling those of a soulless entity. His green skin is slick with slime and streaked with traces of blood. Half-veiled by mist and darkness, his expression conveys a fusion of anguish and malice. The atmosphere is chilling, dominated by bluish and dark green hues, deeply unsettling, with decaying vegetation. Full body visible, the scene exudes horror in grayscale tones.