User blog comment:Xilinoc/Ch. 681 - THE END TWO WORLD/@comment-9282993-20160707154012/@comment-9282993-20160707161206

that's what i'm wondering aswell... what could he have possibly done to prevent almighty Yhwach from breaking Zangetsu?

Oh and he stabbed Ichigo, so he's actualy inserting himself into Ihcigo's past.