Board Thread:Manga/@comment-25933225-20190729085225/@comment-25933225-20190802121306

Deppintosh wrote: 1) Wasn't that the Founding Titan could turn Eldians into titans by screaming?

2) I think it's your second guess. 1) That was my supposition, that's the most likely, but the only time Subjects of Ymir were turned into pure Titans with a scream were the ones injected with Zeke's fluid. We've never seen people being turned ONLY with the scream, tho it would explain how Karl Fritz managed to turn 386.000 people in Titans to build the walls (imagine injecting them one by one...?).

2) Yes, the first and the second guess are the most likely (they can both be true), tho I don't totally put aside my Ackerman theory, I just keep it in mind.