A towering crystalline fortress emerges from a perpetual storm of purple lightning, its glass-like surfaces fracture and reassemble continuously in impossible geometric patterns. The structure defies gravity, with sections floating and rotating independently, connected by bridges of pure energy. At its core, a pulsing void of deep emerald light creates ethereal shadows that dance across its ever-changing façade. Ancient runes carved into its surface glow with an inner fire, while twisted spires pierce the turbulent clouds above. The base is surrounded by a moat of liquid mercury that reflects the chaos above, creating a mesmerizing mirror effect that distorts reality itself. The entire structure seems to breathe, its walls expanding and contracting in an otherworldly rhythm, while ghostly echoes of its impossible architecture ripple through the surrounding space