Brathing Samurai

In the Demon Slayer anime the samurais use stylish breathing techniques, this sub-class is focused in this.

Breath points

When you choose this archetype at 3rd level, you can use this points to activate your breath forms. You'll start with 3 points and will gain additional two at 3, 6, 9, 12, 15 and 18 levels.

Breath forms

At the 3° level you learn 7 attack forms.(new forms can be added and modified talking with the master) 

1°: With your action, you perform a dash with an attack, surprising you enemy, acquiring advantege at the first 30 feet of movement to attack. Additionally

2°: With your action, you perform a spin with your weapon hiting all enemies around you, according the attack distance of your weapon. You should roll a dex test (CD 15) to hit this slash, once you obtain success roll a diferent damage dice to each opponent that you hit. This form costs 1 breath point to be executed.

3°: With your action, you perform a lunge, pushing your enemy 4 meters foward. In a hit you roll a normal damage dice and cause half of the roll in damage, but if your enemy, after be pushed, hit something, a wall or other enemy, the damage cause to the first is increased by the double of the attack roll. (Note: If the object hitted is a player or monster, it recieves, only, the double of the damage dice roll in damage). This form costs 1 breath point to be executed.

4°: Before attack, you can use your bonus action to reduce the damage that you caused this turn by half and gain +1 CA. This form costs 1 breath point to be executed.

5°: With your action, you abandon you attack and focus on defense. With this done you add you dex to you CA (if you had already done it, by using a light or medium armor, you do it again), but you can't attack until your next turn. This form costs 1 breath point to be executed.

6°: With your reaction, you spin your sword in order to repel projectiles shooted against you and any other crature behind you in a row. To be successful in this reaction you need to do a dex test, that overcome the attack roll of the projectile. This form costs 1 breath point to be executed.

7°:With your reaction, you focus on the attacks of your opponent predicting its trajectory. With this form you can roll a dex test against the attack dice roll, if you overcome it you evades the attack and, if its a melee attack, you can do a opportunity attack against this enemy. This form costs 1 breath point to be executed.

Breathing Element/Style

Starting at 7th level, you can choose a style to use as your breath style. Additionally you can modify all 7 forms that were prevously introduced to you at the third level. (In future versions will be possible extend the number of forms, according with the style that you choose)-

Chaining

At 10th level, you can perform up to two "action use" forms in the same turn, in succession.

Total Focus Breathing

At 10th level you can use your breathing points to activate your Second Wind feature, you can use this if you are incapacitated, but it takes a full turn, and when you recover the health you will be knocked prone. 

Hashira

Starting at 15th level, you turns into a master of your breathing style, now you can create your own 8th form. (or a new form in post versions, were diferent brathings will have diferent number of forms)

The Mark

At 18th level you receive a prove of your transcedence of the human limits as a mark. When active, you can freely use you forms wothout using breathing points, the "total focus breathing" feature still costs the breathing points; you don't receive disavantage for dificult terrain and don't receive the effects of exaustion. The active mark persists for your next 10 turns. When the effects of the mark cease, the user will be possesed by pain and weakness, having to succeed in a constitution saving throw (CD 10+constitution), or it will be incapacitated and his total breath points will be 0.