Blightrot

Blightroot is a mechanic only present on difficulty Veteran or harder.

Every Recipe in production buildings has a Blightrot Footprint. This indicates how much pollution is emitted by creating a given good. This pollution accumulates, and by reaching certain thresholds, Blightrot Cysts start appearing on the building. The exact amount of accumulated Blightrot can be seen in the Blightrot tab in a given building’s UI panel.

Each Cyst lies dormant at first and brings some positive side effects with it. But during the Storm, Blightrot Cysts wake up and start to corrupt the Ancient Hearth (indicated by the progress bar above the Hearth and in the Hearth’s UI after selecting it). Once the progress bar reaches the end, a negative effect will trigger, killing a number of your villagers. The more Blightrot Cysts are active, the faster the Corruption progresses.