Santoryu Martial Archetype

The Santoryu Martial Archetype, where someone can attack with three blades. it is a much more recent martial archetype.

Prerequisite: Three sword style, fighting style

Unarmed Fighting

At 3rd level, your training in light and mobile fighting allows you to withstand blows without needing armor. When you are not wearing armor, or using a shield your Armor Class equals 10 + your dexterity + your constitution. Will you are wielding three swords your armor class is increases by 1.

Style Improvement.

At 7th level, you gain better control over your sword attacks. You no longer make your extra attack grated by your three sword style at disadvantage, and you gain the ability to draw three swords as part of your attack action.

Three Weapon Fighting.

 At 10th level, you may start to add your strength or dexterity bonuses to your off-hand attacks.

Sword Blur

At 15th level, your speed and offensive power has come together to allow you to always stay mobile while attacking. Enemies you hit with a melee attack may not make opportunity attacks against you, and all opportunity attacks that are made against you are made at disadvantage.

9 Sword Style

At 18th level, your fighting style has reached its peak allowing you to unless a barrage of deadly attacks. You may make an additional off-hand attacks as a bonus action when using your three sword fighting style from now on. You also gain an additional use of your action surge.