User blog comment:Neowitch/Can Brook die again?/@comment-3986064-20111001211754

I think you can't kill him if you can't kill his soul, you need haki for that or maybe if his soul touches water without bein in the body, it gets destroyed or something, so I guess that the Yomi doesn't really give you the power to control your soul, but to create A SOUL that you have or something...dunno, its really weird