A fighter forged by himself, this Archetype is not taught. Some see it and copy it. Some train for themselves to their limits and beyond and acquire this Sword style on their path.
There are no rules to how someone finds the Way of the Sword, but once you found it, it is hard to let go of it.

You cut through your enemies Armor and then strike swiftly as if your blade would weight nothing.
Until no enemy is left.
And once you find your Limits you break them, this is what this style is about.

Cut through Steel

When you choose this archetype at 3rd level, you first train your sword to become stronger.
Your first Attack against an Enemy will reduce his AC by 1 until the end of the fight.

This bonus gets higher as you train.
The AC reduction goes up by one on level 6,10 and 16.

Sword Spirit

Starting at 3rd level, your intensity in battle can shield you and help you strike true. As a bonus action on your turn, you can give yourself advantage on weapon attack rolls until the end of the current turn. When you do so, you also gain 5 temporary hit points. The number of temporary hit points increases when you reach certain levels in this class, increasing to 10 at 10th level and 15 at 15th level.

You can use this feature times equal to your Strength modifier, and you regain all expended uses of it when you finish a long rest.

Trained Senses

Starting at 7th level, your discipline and attention to detail allow you to excel in situations that need an instinctive touch. Whenever you make a Wisdom (Perception) or (Survival) check, you gain a bonus to the check equal to your Strength modifier.

Your self-control also causes you to gain proficiency in Wisdom saving throws. If you already have this proficiency, you instead gain proficiency in Intelligence or Charisma saving throws (your choice).

Can't be touched

You can now cut through bolts, arrows, magic, etc. any ranged attack.

You can use your reaction to reduce the ranged attack throw of an enemy that targets you or an Allie behind you, by 1d10+{{classlevel}}.
The Projectile has to move through a 5 foot radius around you, for you to be able to reduce this attack throw.
Furthermore, you can cut through any beam, missile or other projectile with the same restraints.

 

Sword strike barrage

Starting at 10th level, you learn the ability to exchange strong strikes for weaker but faster ones.
Once on your turn, you can take the Attack action, and choose to attack twice per attack with a weaker strike.
Your weapon dice is reduced by one for these strikes, and your modifiers can only be used on the first strike of each attack.

a d12 becomes a d10
a d10 become a d8
a d8 becomes a d6
a d6 becomes a d4
a d4 stays at a d4

You can do so a number of times a day and regain all uses during a long rest.

Moving barrage

Once you have used your Attack to use Sword strike barrage, you can choose to use your bonus action to disengage.
This allows you to switch targets during Sword strike barrage.

Furthermore, if you kill an enemy while moving barrage is used, you regain 10 feet of movement.

You can use this ability a number of times a day and regain all uses during a long rest.

Exceed your body

Starting at 18th level, you can push your Body to exceed its limits.
You can choose one round in which you can exceed your physical Limits as you gush out an extra amount of energy.
As you swing your sword with both force and speed the blood shoots into your hands and drips out through your Skin pours causing you 1d4 Necrotic damage, which can not be reduced, per doubled attack.
But this does not just come with a drawback, as you focus your mind on Speed and Power you don't reduce your damage dice for this round but still double the attack.