A dramatic, dynamic cover image for 'The Fall of Heaven: Xrès'. The scene is set in the fiery depths of Hell, a vast landscape of jagged black mountains and rivers of molten lava. Dominating the foreground is Xrès, a stunning goddess with long, flowing blonde hair and striking black wings that spread wide, partially obscuring the infernal sky. She wears elegant, yet revealing, black armor that accentuates her form, and her eyes glow with an unholy light, radiating a sense of power and malice. Standing beside her is Kael Thorne, a formidable warrior with long black hair and a beard, embodying raw strength and a thirst for vengeance. He is clad in dark, battle-worn armor, and his expression is one of grim determination. Behind them, the red demon Zvarath emerges from the inferno. The composition should be cinematic, with a slight low-angle shot to emphasize Xrès' dominance. In the background, subtle hints of a celestial realm, maybe a glimpse of white light, is contrasting to the hellish environment. The overall mood should be a blend of dark fantasy, with a strong sense of conflict, and sensuality.