Bug ? Disease not killing

[Wrana]

Regeneration, of course. It's even given as a way to rescue old commanders, in Tien Chi strategy thread iirc.

[Tuidjy]

What Wrana means is that if your Pretender's nature magic grants a bless, you
can forge Shrouds of the Battle Saint, and give them to your diseased commanders.
The regeneration will keep them alive, and they will get only 1/13th of the
additional afflictions they would get otherwise.

You can achieve the same effect with a ring of regeneration, hydra skin, etc...
but those are a bit more costly and harder to forge.