Board Thread:Manga/@comment-25228560-20170402150806/@comment-28958062-20170403232457

My personal theory is that Ymir Fritz accidentaly connected with the Primogenital titan, who then used Ymir as a host and proceded to connect itself with the Eldian population using Ymir's DNA as model

However Ymir's body couldn't hold it for more then 13 years so the Progenital titan ended up splitting itself in nine parts to other hosts due to its power being too great to transfer this way as whole and caused the Progenital itself to lose control over its host.

Due to using Ymir's DNA, most of its power passed to Ymir's relatives and could only be fully used by them.

The fact Ymir split herself in nine is actually pure congecture, all Eldians are infected but only nine at a time are able use it rationaly.

In short the Progenital Titan is a parassite being that lives trough those of Eldian blood, the Titans are a manifestation of its sickness triggered by consuming a Titan's spine fluid.

Uniting all Shifters in one could be an horrible idea as then the Progenitor Titan would be whole again, aware of its host weakness and might try to take over the world to assure its existence.

Who can our heroes cure themselvers? simple find the Primogenital titan's source and destroy it, currently it's projecting itself to the coordinate and can only be found with the coordinate as a guide.