Board Thread:Manga/@comment-26495049-20161020222547/@comment-27441457-20161021012610

I'm 100% positive the Titans are still a scientificly created monstrosity. I feel like the "Devil of All Earth" wasn't literally the lord of all evil, but instead someone or a group of someones who held knowledge all the other people of the earth couldn't comprehend.

My guess would be that the Devil was someone who had safeguarded the information necessary to create Titans with ancient technology. Since Ymir lived in an age of spears and swords, it's very likely the people of her time would assume her powers were supernatural, and with the Eldians' genocide and rape of the Marleyan people, it's no wonder the latter would come to the conclusion that this unspeakable power put to evil use must have come from the Devil himself.