Board Thread:Manga/@comment-26495049-20161020222547

I guess before chapter 86 was released,  we've all assumed   that Titans were a product of some sort of (failed?)experiment, as the only known way of creating Titans is via serum that comes in the form of an injection. Now, holy shit, we are told that Titans were created by some sort of pact Ymir Fritz made with the "devil", which implies some sort of supernatural origin for the Titans.

So which is right? Could this mean that there is some sort of higher power in the AoT world? Or could the "devil's pact" explanation be just part of Marley propaganda to make themselves appear like the good guys?  