" What is 'courage'? 'Courage' is knowing fear and making that fear your own! Losing your breath is fear! But when you control your fear, you can breathe regularly! Hamon breathing is the result of courage! Human praise is the praise of human courage! Human greatness is the greatness of human courage! " 

- William Antonio Zepelli.

The Way of Sendō is one not known by many monasteries, let alone practiced; only 1 in 1,000 know the secrets to the fighting style known as Sendō. The art of Sendō is one that focuses on ripples created through calm and collected breathing, manifesting an ability known as "Hamon", containing powers similar to the energy of the sun. Hamon masters usually use this art to either harm or heal, manifesting as yellow crackles of lightning or a soft multicolored glow, usually around their arms.

 

 

Hamon

Upon choosing this Monastic Tradition at 3rd level, whether a master has taught you, a stranger jabbed their little finger in your diaphragm, or it began to manifest, you gain access to the mystical ability known as "Hamon." Minor uses for Hamon could be holding a liquid within an upside-down container, hardening dead leaves to the toughness of cloth, or healing minor cuts. However, to use it to its fullest potential requires courage, steady breathing, and ki.

As a bonus action, you can spend 1 ki point to infuse your unarmed strikes or any conductive object with Hamon for a number of rounds equal to your Wisdom modifier + half your proficiency bonus (minimum of 1). Whenever you attack, you deal additional damage equal to your Martial Arts die roll. This damage counts as radiant damage. You can spend additional ki points for additional damage dice.

These are some items that are conductive to Hamon:

• Living creatures (human, elf, dwarf, animals, etc.)
• Organic material (organs, hair, plants, cloth, etc.)
• Liquids (water, oil, blood, etc.)

As an action, you can spend 1 ki point to heal another creature that you can touch. The amount of hit points healed is equal to your Martial Arts die roll. You can spend additional ki points for additional healing dice.

If you cannot breathe properly, you can't use Hamon features. While grappled, restrained, or frightened, you cannot control your breathing properly.

Zoom Punch

At 3rd level, as an action, you may spend 1 ki point to launch your fist forward and strike your opponent via an elongated arm. The attack involves a Ripple breathing technique that dislocates and stretches the joints to extend the arm and give it greater reach while also using the same Ripple to dull the pain caused by the move. Due to the increased length, the strike immediately reaches the opponent's face first, which from that perspective seems "zoomed in".

This feature acts as a +1 unarmed strike with +5 feet of reach. This increases to +2 and +10 feet at 11th level. This can be used a number of times equal to your Wisdom or Constitution modifier, regaining all uses at the end of a short rest.

 

Beginner Overdrives

Beginning at 6th level, your Hamon has become potent enough to harness different manifestations of it. You can use the following Overdrives:

Scarlet Overdrive

Your Hamon glows a brilliant red and crackles like an intense flame. As a bonus action, you may spend 3 ki points to create scarlet Hamon. Your next unarmed attack deals an additional 4d(Martial art size) fire damage. You can spend additional ki points for additional dices. Any flammable objects that are struck with this attack immediately catch on fire.

Turquoise Blue Overdrive

Your Hamon glows a brilliant blue and roars like an incredible tempest. As an action, you may spend 3 ki points to create turquoise Hamon and make a ranged attack that equals your Martial Arts die and 3d(Martial art size) force damage. If the attack hits, the enemy is pushed back 10 feet. You can spend additional ki point for additional d4s and push the enemy back 5 feet farther. The range of this attack is 15 feet times your wisdom modifier.

Metal Silver Overdrive

You conduct your Hamon to anything that seems metal and crackles with a silver shine. As a bonus action, you may spend 3 ki points to infuse whatever weapon you hold with Hamon. Your next Attack with that weapon deals an additional 4d(Martial art size) radiant damage. You can spend additional ki points for additional damage dice.

Sunlight Yellow Overdrive

Your Hamon shines a golden yellow, as bright as the sun itself. As an action, you may spend 4 ki points to make a devastating Attack, rolling 8 Martial Arts dice, the first 4 being regular unarmed attacks and the other 4 being used for radiant damage. You must take a short or long rest before using this Overdrive again.

Sendo Hamon Overdrive

Your Hamon shines a crackling yellow, similar to the electric power of a storm. By spending 3 ki points,  the Ripple User charges a Ripple wave through their arm and releases it into a solid object, such as a wall or partition. The Ripple can travel through and reach anything on the other side, and anything hit by the Ripple is sent flying in a spiral 10 feet straight back from the charged object or building. This feature requires 1 Full Round to charge. Once charged, the Ripple User can make an unarmed attack against any surface. Once touched, the surface will send out a Ripple wave in a 15-foot radius damaging only the chosen targets of the Ripple User for 5d(Martial Arts Die) Radiant Damage.

Ripple Detector

By spending 1 ki point,  the Ripple User can imbue a contained liquid with the Ripple as an action. The Ripple will pass through the liquid's holder's body and the environment, enabling the holder to sense his surroundings and detect others even through walls. This feature requires a container of water or some other liquid to be used. When utilizing it, the Ripple User gains advantage on all Perception checks. This bonus stacks with any other advantage to Perception gained from other factors. This ripple detector stays active for 1 minute for each ki point spent.

Forced Breathing

Beginning at 11th level, you learn to pinpoint vital organs in a creature's respiratory system. You can use a bonus action to use stunning strike on the next unarmed strike you make without spending a ki point. However, if you spend 4 ki points to perform this action on a willing creature, they also have to make a Constitution saving throw to beat your ki save DC. If it fails, they take the damage rolled and are afflicted with the stunned condition. However, if it is successful, they temporarily have access to the Hamon feature for a number of rounds equal to your Wisdom modifier. They can perform the same actions and bonus actions as if they have the feature, with a reserve of points they can use equal to their Wisdom modifier (minimum of 1).

 

Advanced Overdrives

Starting at 11th level, your Hamon has reached even greater heights. You are now able to use the following overdrives:

Tornado Overdrive

By spending 2 ki points,  the Ripple User leaps into the air and points their legs towards their opponent. From here, they are able to move the Ripple to their lower half and essentially dive bomb the opponent in a spinning motion, much like a drill. As an action, you make an attack using Strength or Dexterity against a single target. If successful, the target is dealt 3d8 Radiant Damage (6d8 against undead targets). This attack has a range of up to 15 feet, and moving in this manner does not provoke attacks of opportunity. You can use this a number of times equal to your Strength or Dexterity modifier, regaining all uses at the end of a long rest. 

Channel Ripple Overdrive

The Strength of your Ripple can now persist through liquid, primarily water and oil, up to ten feet from you, and deals the same damage as your Ripple Overdrive. This also pushes them 5 feet away from you if underwater. Channel Ripple Overdrive can be used twice per short rest and requires 3 Ki points.  As well, your Ripple is steady and strong. By allowing it to go through your feet into liquid, you can now walk on water/oil for 1 minute per Ki point spent. At 3 Ki points spent, you can bring one ally with you as you walk over the water. Additionally, you can add +5 to any climb check on a watery/oiled/slippery surface by spending 1 Ki point and climbing with your fingertips.

Hamon Cutter

You can spit globs of liquid from between your teeth. The Ripple combined with the liquid makes it sharp and dense enough to cut through solid objects, as well as agile and accurate enough to deflect other projectiles. To use this feature as an action, the Ripple User must have water or some other liquid in their mouth. For 1 ki point, They may fire up to 3 cutters per mouthful of liquid. The targets must be within 30 feet and succeed a DC 8+your Dexterity modifier+your proficiency bonus Dexterity Save per cutter or take 2d(Martial arts die) Slashing Damage per successful hit. To deflect a physical projectile attack using this skill, the user must make a Dexterity saving throw that exceeds or equals the attacker's projectile attack roll as a reaction. This cannot be used to deflect spells.

Ripple Hair Deflect

By spending 2 ki points, the Ripple User infuses their Ripple into strands of hair, thread, or wire to make them hard enough to block incoming projectiles. As a reaction, they can roll either a Dexterity or Constitution save against any incoming attack, including spells with physical attributes (example: Fireball or Witchbolt). To successfully deflect the attack, the Ripple User's save must meet or exceed the attack roll. If a spell requires a save, this feature takes the place of that saving throw, and does not stack with it. Spells that do not have physical attributes (examples: Fear or Blight) cannot be deflected in this way. This can be used a number of times equal to your Dexterity modifier + your Charisma modifier. You regain all uses at the end of a short rest.

Ripple Hypnosis

By spending 4 ki points, the Ripple User can hypnotize people by using the Ripple on them. The process can involve a kiss or simply touching their head with your hands. The hypnotized target will act according to the user's demands to a degree. A Ripple User can also extract forgotten memories using this technique As an action, the Ripple User's Charisma based Skills are treated as Proficient (or double proficient if already proficient) against the target of the Ripple Hypnosis.

Deep Pass Overdrive

At 17th level, you master the final technique of Hamon: the Deep Pass Overdrive, using it to transfer some of your own life energy into others. As an action, you may spend 5 ki points. The target regains 5d8 hit points. However, you take the number rolled as damage and age by 5 years. You may spend additional ki points for each additional Hit Die. For every additional ki point you spend, you age by an additional 5 years. You regain use of this feature after a long rest.

But, you may choose to expend all of your ki points and die to permanently give the target creature all of the following:

• The target gain 3d8 additional maximum hit points and three hit dice that are d8s.
• Access to the Hamon and Overdrive features.
• A pool of ki points equal to the creature's Wisdom modifier (minimum of 1) that can be regained after a short or long rest.