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.