Board Thread:Questions and Answers/@comment-28648393-20160616142328/@comment-24945873-20160625063733

That's it. Remember the Shin'eyaku Kisuke created? He said that Hollow Reiatsu is poison to the Quincy. If a Quincy takes in hollow Reiatsu, the Quincy's spirit energy will weaken and their souls will be destroyed. So if Yhwach is absorbing Ichigo's powers, if it's all of them and not just Ichigo's Quincy powers, then Yhwach will take in the Hollow powers Ichigo's possesses, and the former's soul will be destroyed. Next to that, the only ones that can save Ichigo and Uryu right now, are their fathers, Isshin and Ryuken, respectively. It's a good thing the father's arrived in Warwhelt when they did. Now they can assist their respective sons.