The one-hit overhead vertical slash, «Vertical».

That said, the skill wasn’t that strictly vertical. Vertical would usually incline by around ten degrees depending on the master hand’s orientation and as such, the trajectories of the two facing off would cross if they activated it simultaneously, pushing both of them away upon clashing.

That occurred this time as well, but only half of it. The black sword and the Blue Rose Sword collided at around a third from their ends and let out dazzling sparks.

(Alicization Uniting, 25)