User blog comment:Xilinoc/Ch. 553 - Frozen Cross/@comment-1747976-20131020025317/@comment-5147109-20131021202029

I have a theory that Vollstandig while vastly superior to Letzstil most likely still has its weaknesses such as they can probably only use it for a set amount of time before it dissipates and once that happens while I'm sure they still have access to their powers it probably leaves them in a weakened state, otherwise they could just walk in to Soul Society and activate it and just rip the whole world apart, literally.