User blog comment:IamJakuhoRaikoben/Chapter 360: The White Inheritance, Review./@comment-78.144.241.52-20131116073908

My theory/ies on the Faith/White Inheritance:

It's a powerful thing that can be misused as a powerful evil thing (an obvious theory).

It's a certain type of Holy Magic that can be used to fight demons that they want to destroy. (an obvious theory).

Something that revives E.N.D or possibly brings him back to his full strength.

It's actually a type of Magic whose effects can be used to spread some sort of Demon disease globally and basically converts/mutates/metamorphoses/modifies/whatever Humans and other species into Demons. Like a Demon version of a purge or purification.

A throwaway theory I had: it purifies the Demons and makes them Human which is what they truly wanted. (It makes 0 sense).

Those are just a few theories I had. I have a few more but can't be bothered right now.