A green and black curved blade with a white and green wrapped handle, and has a guard that is an eight sided star shape. It feels mostly powerless, magically, but as the user takes a deep breath in, the wind seems to pick up... When this breathing is honed, the sword becomes able to unleash incredibly powerful Wind based arcane attacks.

Second Form(Gust of Wind) - A line of strong wind 60 feet long and 10 feet wide blasts from you in a direction after swinging the sword forward quickly. Each creature that starts its turn in the line must succeed on a Strength saving throw or be pushed 15 feet away and takes 1d12+2 bludgeoning damage on a failed save, or half as much damage on a successful one. The gust disperses gas or vapor, and it extinguishes candles, torches, and similar unprotected flames in the area.  As a bonus action on each of your turns, you can change the direction in which the line blasts from you.

Seventh Form(Wind Wall) - A wall of strong wind rises from the ground at a point you choose within range after you swipe straight up with the Katana. You can make the wall up to 50 feet long, 15 feet high, and 1 foot thick. You can shape the wall in any way you choose so long as it makes one continuous path along the ground. The wall lasts for the duration. When the wall appears, each creature within its area must make a Strength saving throw. A creature takes 2d8 bludgeoning damage on a failed save, or half as much damage on a successful one. Loose, lightweight materials brought into the wall fly upward. Arrows, bolts, and other ordinary projectiles launched at targets behind the wall are deflected upward and automatically miss. (Boulders hurled by giants or siege engines, and similar projectiles, are unaffected.) Creatures in gaseous form can't pass through it.

Proficiency with a Shortsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Engage in Wind Breathing as a Movement Action before using an Wind Attack, Damage, Combat, Finesse, Light, Vex