Visualize a towering obsidian fortress, its jagged spires piercing the twilight sky, glistening ominously under a crescent moon. Dark, volcanic rock glows with an ethereal energy, casting deep shadows across the rugged landscape. Surrounding the fortress, a turbulent sea crashes against jagged cliffs, while wisps of mist curl around its base. Flickering torches line the fortress walls, illuminating intricate carvings that hint at ancient secrets and forgotten battles.