User blog comment:SunXia/Chapter 418, Deicide 20, OMG!!/@comment-1774413-20100902005537/@comment-1906999-20100902010446

I don't think that he explained any time length for it. He simply said that the way to defeat his power was to touch his blade before he releases. I took it that doing that would negate that power all together, but it wasn't specified either way.