You achieved more control with your ki, now you can concentrate your ki inside your fist and let go right when you deliver a pucnh.

Closed Hand Technique

Starting when you choose this tradition at 3rd level, you can interrupt your enemy’s ki with your own. You can spend 1 ki point to make 1 aditional unarmed strike attack as a bonus action, and then you can impose one of the following effects on that target:

• It is knocked prone and pushed back 5 feet
• It must make a Strength saving throw. If it fails, it takes 1d4+your modifier damage,.
• It can’t take reactions until the end of your next turn.

Concentration of KI Inside Your Body

At 6th level, you gain the ability to concentrate your ki on your injuries to increase regeneration speed. As an action, you can regain hit points equal to three times your monk level+2. You must finish a long rest before you can use this feature again.

Nimble fists

From 11th level, your fists require less strength and more agility and dexterity. You can make ability checks that your rigid grip feature applies to using your Dexterity modifier instead of any other modifier.

Everything fists

As you have experienced all kinds of damage you can now replicate it with your fists. By using the power of ki you can make your fists deal any type of damage. Using 1 ki point you can make every unarmed strike deal the exact damage type that you truly want.

Quivering Palm

At 17th level, you gain the ability to set up lethal vibrations in someone’s body. When you hit a creature with an unarmed strike, you can spend 3 ki points to start these imperceptible vibrations, which last for a number of days equal to your monk level. The vibrations are harmless unless you use your action to end them. To do so, you and the target must be on the same plane of existence. When you use this action, the creature must make a Constitution saving throw. If it fails, it is reduced to 0 hit points. If it succeeds, it takes 10d10 necrotic damage.

You can have only one creature under the effect of this feature at a time. You can choose to end the vibrations harmlessly without using an action.