What does it mean exactly ? Many could break it down and speculate,but since there is so many ways to interpret the name it could be quite confusing to pin point the exact meaning without confirmation from kishi himself.

So for the threads sake i would like for people to guess what type of space time technique it could possibly be if it is one at all.

I theorize that its a slash from his sword that cannot be blocked.The technique cuts through space time itself.Kinda like the resenshuriken in terms of cutting power,but of the highest caliber separating molecules into two.

What do you think ?

(For all we know minato could of also been talking about edo tensei as well since there is no way to clarify)(Also it could of have something to do with suiton since he is known for being able summon torrents of water from nowhere.)