User blog comment:Xilinoc/Ch. 541 - THE BLADE AND ME 2/@comment-7924893-20130612200535/@comment-10630156-20130615080500

Maybe the Quincy or at least Yhwach didn't "evolve" in the human world and as such Yhwach is a soul they age as slowly as Shinigami do and this means that Yhwach was a resident of the Soul Society about 999 years ago when he fought Yamamoto. He could have simply have been exiled by Yamamoto or Central 46 to the Human World after his defeat hence why the Quincy appear in the Human World. The whole "seal" could have simply have been placed on his quincy powers not on him if this is the case then it is likely that the Quincy palace is somewhere in the human world. Kinda reminds me by the look of it as some version of the Hyperborea myth to me which would fit in with the whole Germanic thing Kubo is doing and it was said to have been located in the middle of the Artic somewhere... HMMM might have something here...

Another thing to note is that the purge of the Quincy didn't happen for 700-800 years after the defeat of Yhwach and this we know was the whole upsetting the balance of souls thing. This means that the original offense of Yhwach didn't have much if not any connection to the balance of souls and if that is the case then what was his original crime?