The horizon stretches out high into the sky, surrounded by a sprawling underground arena where a complex network of underground tunnels is organized. As the sun dips below the horizon, a powerful force emerges from the ground, causing it to lift and throb for anyone who dares to cross it. The ground below is made of a dusty surface, covered in a thin layer of ice and ash. The shelter is guarded by a group of scientists and engineers attempting to reclaim the land, but these survivors are not ordinary people, their faces shrouded in darkness. The water huddles beneath the feet of those in the area, drowning out every nook and cranny that surrounds it.