The Rust Prophets Reformation is a splinter sect that broke from the original Rust Prophets in 2194 over a fundamental theological disagreement: where the Rust Prophets see decay as sacred — entropy as the voice of the divine — the Reformation argues that decay is merely the first half of a cycle, and that what matters is what grows from the rust. This seemingly minor doctrinal difference produced a schism that turned violent, and the Reformation now operates as an independent movement with roughly 3,000 adherents, mostly in the Shelf and the Underworld.

The Reformation's practice centers on what they call 'growth rituals' — ceremonies conducted in places where old infrastructure is being reclaimed by nature or repurposed by human necessity. They worship in abandoned buildings where moss grows through concrete, in Underworld tunnels where fungi colonize old pipes, in Shelf structures where residents have built new spaces from the corpses of old ones. Their theology holds that the divine is not in the breaking but in the remaking — that God is a recycler, not a destroyer.

This theology gives the Reformation a surprisingly constructive character for a group that emerged from a tradition of entropy-worship. Members are often involved in Shelf construction and repair, reclaiming materials from abandoned structures, building community infrastructure from salvage. They're the people who turn a collapsed building into a community garden, an abandoned subway tunnel into a living space, a pile of industrial scrap into a water filtration system. Their skills are practical, their labor is free, and their presence in a Shelf neighborhood is generally welcomed even by people who think their theology is nonsense.