I remember in 4e there were rules by which a tainted characters' corruption got worse. They had to periodically make earth ring checks to resist further corruption. The Shadowlands supplement for 5e describes how the taint gets worse over time, but I don't see similar mechanics. Am I looking in the wrong spot? Specifically, I'm wondering if there are mechanics for the following:
- Acquisition of taint
- Progression of taint
- Jade's protection against taint
- Jade petal tea's suppression of symptoms
House rules are welcome too, if there aren't rules for these things.