Through your years of practice with martial arts as well as bladed weapons, you finally managed to turn your own body into a weapon equally as dangerous as the ones you wield. Your training has turned your body as hard and as sharp as a sword, but that is just the beginning. Soon you discover ways of extending your attacks far beyond the capabilities of lesser warriors, allowing you to slash opponents without touching them.

Iron body technique

Through tireless training, your skin starts to harden into natural armor. Starting at 3rd level, your skin temporarily becomes as hard as steel, giving you the same protection as full plate armor without the strenght requirement. At the start of your turn, you may use 1 ki point to activate your Iron body technique as a bonus action, increasing your armor class to 18 for the next ten minutes.

Iron fist strike

Your hardened body makes your strikes significantly more painful, rivaling the power of war hammers. Also at 3rd level, your unarmed strike deals an additional 1d4 bludgeoning damage while you have you are using your Iron body technique. 

One with the sword

Also at 3rd level, your understanding of the sword, your soul and your own body allows you to wield a variety of weapons normal monks are incapable of. You gain proficiency in all simple and martial bladed weapons regardless of special properties and can wield them as monk weapons.

Iron blade technique

Your body has become one with your weapon, to the point that you can imitate its effects. Starting at 6th level, while you are using your iron body technique, you can choose to deal 1d10 slashing damage with your unarmed strike instead of your normal martial arts die.

Flurry of slashes

Also at 6th level, your proficiency with the blade extends far beyond normal peoples capabilities. Immediately after you take the Attack action on your turn, you can spend 1 ki point to make two additional weapon attacks with a blade instead of your extra attack.

Iron hand technique

At 11th level, your ability to manipulate Ki finally extends beyond the limits of your body and allows you to attack your enemies from a distance. The motion of your hands now create gusts of wind, that carry your attacks further than you could reach. You can use 1 ki point to attack an opponent with a gust of wind with your unarmed strike. This strike deals the same amount of damage as your regular attacks and can also be used with the Iron body and Iron blade techniques.

Wind blade technique

As the reach of your fists extends beyond the limits of your body, your mastery of the blade extends further still. Similar to how you create wind with your unarmed strike, you now create a similar effect with your weapons. When you use a bladed weapon for a armed attack, you can use 2 ki points to extend that attack by 15 ft. beyond the normal reach of that weapon. That attack deals 1d10 slashing damage, no matter which weapon you use it with. Your target must also succeed a DC15 Dex saving throw ir be knocked prone.

Iron cyclone technique

At 17th level your mastery of the blade and your body have reached their peak. By channeling 5 ki points into your hands, while using the Iron body technique, you can now unleash the Iron cyclone. In one fluid motion you create a vortex of slashes that reaches in a radius of 15 ft. in all directions from where you are standing. Each creature in that radius is attacked twice by your Iron blade technique, taking 1d10 slashing damage upon each succesful hit. They must also succeed a DC 15 Strenght saving throw or be pushed back 15 ft. away from you.