The underground resistance movement fighting against the Lord Ruler's thousand-year reign over the Final Empire. The skaa - the oppressed lower class, kept in near-slavery by the nobility - have attempted uprisings before, but all have been crushed with overwhelming force. The rebellion operates in secret cells across the empire, coordinated by leaders like Yeden, who serves as its figurehead during the events of The Final Empire. Kelsier's arrival promises something the skaa have never had: an Allomantic crew, a real plan, and a leader who carries the kind of legend that can move people who have never been allowed to hope.

The dominant religion of the Elendel Basin in the era of Wax and Wayne, founded on the worship of Kelsier - the legendary rebel who defied the Lord Ruler in the final days of the Final Empire and is venerated by the faithful as the Survivor of Hathsin. The Church teaches that his example proves even the powerless can overcome tyranny, and his legend has become one of the defining cultural forces of the new world, though its relationship with Harmony is complicated.