Specifically the Consuming Creature template from the Advanced Bestiary (found here).
In the template it says the Consuming Curse can be negated with a Will save, but nowhere that I can see does it list what the DC of that save is or how to determine the DC, at least not exactly.
It does say that the DC for the consuming curse is Charisma based. I have a difficult time believing that the DC would just be the Charisma modifier of the Consuming creature, so I would guess it would be something like 10+Cha mod, but even that seems quite low.
If I'm missing something obvious, I'm sorry, but I am interested in using this template, but I feel as if I'm missing something to make it work.