What if there was a limited resource that people needed to consume like food, and without it they would lose their ability to do good?
What would that resource be?
How would it be acquired?
What would happen without it?
Off the top of my head, I see two potential consequences:
These options aren’t mutually exclusive. The setting can support both inflictions.
The resource should be from beyond the immediate world.
I think this goes particularly well with the latest direction of TWOLD. I’ve gone from not knowing what more to do with the Asylum, to having an abundance of madness mechanics.