Seventy Year Staircase

In a modern world abruptly shaped by the emergence of a single, sprawling Dungeon, humanity's future now rests on the shoulders of those brave or desperate enough to delve into its depths. Known simply as The Seventy Year Staircase, this singular, monolithic structure features openings across the globe, offering untold wealth and power, yet it is so vast it is estimated to take 70 years to fully traverse.