User blog comment:Xilinoc/Ch. 680 - THE END 2/@comment-28826800-20160630175830/@comment-5398287-20160630202438

Yeah, I think this is a classic case of power getting to the villain's head. The same thing happened with Aizen back in the day. Up until this point, Yhwach's been waaaay more pragmatic when it comes to handling Ichigo, but I guess he's on a power high now.