User blog comment:Xilinoc/Ch. 588 - The Headless Star 7/@comment-24384892-20140709124531/@comment-1338810-20140711043531

What makes you think Yhwach doesn't have story-breaking powers in the form of all the dead Sternritters' abilities? After all, he *gave* those powers to the Sternritters in the first place - why wouldn't he reacquire them?

Also: Aizen with or without Hogyoku and Orihime. Bleach is no stranger to characters with powers that defy reason.