A massive, menacing fortress hovers in mid-air, suspended by crumbling chains that creak ominously under their own weight. Its jagged walls and spires twist unnaturally, pulsing faintly with the sickly green glow of sporadic lightning. The entire structure is engulfed in roiling storm clouds that rumble with deep, guttural thunder. Below, a bottomless chasm yawns wide, swirling with dense mist and writhing shadowy shapes that seem to reach upward, as though hungry for the fortress above. The air is heavy with an oppressive sense of dread, and the faint whispers of unseen entities echo through the darkness.