User blog comment:Kaido King of the Beasts/How Do You Kill Quincy Jesus?/@comment-26544002-20151214000703/@comment-26091912-20151214122208

Well after re-reading this current chapter, I think he already used it. When he "finished off" Gerard, he wasn't holding the sword handle, his hands were free.

Either he used it this chapter, or Kubo must have forgotten about it, because he wasn't holding the sword handle here either: