The [Wind: Blade Rush] was an offensive spell art. Upon using it, three rotating blades of wind would shoot out and tear the target to pieces. It operated on the principle of a single blade of wind creating two additional blades simply by flying through the air.
It was theoretically simple, but to achieve three blades, the user must master the spell art.
Furthermore, Misho figured out that the spell art operated on Bernoulli's Principle. In other words, there actually wasn't any limit to the number of blades of wind the spell art could create.
The limiting factor was the mastery of Bernoulli's Principle.
Since it was a physical phenomena and subject to fluid dynamics, it was obviously extremely difficult to go beyond three blades of wind. A lot of mental calculations had to be done for the user to exceed three.
Misho realized this.
