Having spent years controlling the flow of ki inside and outside your body through meditation and training, you have gained increased control over your own ki an the way it flows conpared to other monks. You can now force it upon others or betther the flow inside you to enhance your combat, altough it will never be an exact science, your mastery over ki makes you honored among your peers.

Level 3: Delayed Blast

At 3rd level when you take this subclass you unlock the Delayed Blast : When you hit a crature with a melee attack you can use 1 ki point to charge it with pure ki and leave a mark on the attack target. As a bonus action you can activate all the mark on the enemy, making them explode and dealing force damage equal to your martial art dice times the number of marks on the enemy + 5 (for example at level 1 you will be dealing 1d4*number of marks + 5).

Level 6: Overwhelming Adrenaline

At 6th level, following the adrenaline of a Critical Attack the ki in your body and outside flow more rapidily and in harmony, making you regain one ki point.

Level 11: Enhanced Ki Flow

When you reach 6th level you learn how to enter in a state of constant ki folw. As a bonus action you can expend 3 ki points enter this flow state. You must expend 1 ki point at the end of each of your turns to remain in this state. While in Enhanced Ki Flow you gain proficency in savings trows against being charmed or frightened. After each succesfull unarmed melee attack roll during this state of flow you can roll a d8 (this dice becomes a d6 at level 11th and a d4 at level 17th) , and on an 7-8(or 5-6/3-4) you can use an Hollow strike: when you use this feature  roll a d100 and your previous attack will gain properties absed on the result.
1 - 5: The attack deals its damage to you instead.
6 - 15: The attack dosn't gain any additional properties.
16 - 35: The attack gains additional force damage equal to your martial arts dice.                                                                                                                                                                                          35 - 45: The attack gains additional force damage equal to twice your martial arts dice.                                                                                                                                                                              46 - 60: The attack blinds the target.
61 - 70: After the attack you may freely move the target 5ft in every direction .
71 - 80: The attack gains additional force damage equal to your martial arts dice, also the attack target is knocked prone.
81 - 90: The attack target gains five Delayed Blast marks and has its moovement speed halved until the end of your next turn.                                                                                                          91 - 99: The attack target becomes incapacitated until the end of your next turn.
100: Choose any two of the previous effects to give to the attack.

Level 17: Perfected Ki Flow

Starting at 17th level, when entering Enhanched Ki Flow you gain immunity to being Charmed or Frightened, also your AC is is temporarely icreaded by a number equal to your Dexterity modifier. While in this state, your Deflect Missiles feature when a ranged attack misses you or when you are the target of a ranged spell attack misses or hits. If used on a ranged spell attack the damage you take from the attack is reduced by 5d10 + your Dexterity modifier + your monk level, also the damage from the attack you may use in response becomes equal to the damge that spell would have dealt you.