User blog comment:Xilinoc/Ch. 683 - The Dark Side of Two World Ends/@comment-4080775-20160727005940/@comment-4080775-20160728020608

I know what it means, but if Yhwach's power is so absolute and flawless like you seem to word it, how is it that Yhwach thought he saw Ichigo when it was really Aizen? If he could see all futures as clearly as he says, he wouldn't have said that at all. He would have known it was Aizen and said Aizen. There are clear flaws in his ability. You mentioned any power which Yhwach knows will become his ally and will be unable to defeat him. Yet, Ichigo's latest attack did some type of harm to Yhwach, even though he shrugged it off before breaking Ichigo's bankai. It's obviously of some danger to him if he was willing to take Ichigo seriously after such a stunt.