Warrior of the Tiny Prick

This is an offshoot of the way of the fist specializing in daggers. 

Level 3: Way of the Tiny Prick

Gain weapon Mastery in daggers.

Level 3: Tiny Prick Technique

You may make your Flurry of Blows attacks with your daggers instead of your unarmed strike.

Whenever you hit a creature with an attack granted by your Flurry of Blows, you can impose one of the following effects on that target.

Addle. The target can’t make Opportunity Attacks until the start of its next turn.

Slow. If you hit a creature with this weapon and deal damage to it, you can reduce its Speed by 10 feet until the start of your next turn. If the creature is hit more than once by weapons that have this property, the Speed reduction doesn’t exceed 10 feet.

Vex. If you hit a creature with this weapon and deal damage to the creature, you have Advantage on your next attack roll against that creature before the end of your next turn.

Level 6: Wholeness of Body

You gain the ability to heal yourself. As a Bonus Action, you can roll your Martial Arts die. You regain a number of Hit Points equal to the number rolled plus your Wisdom modifier (minimum of 1 Hit Point regained).

You can use this feature a number of times equal to your Wisdom modifier (minimum of once), and you regain all expended uses when you finish a Long Rest.

Level 11: Fleet Step

When you take a Bonus Action other than Step of the Wind, you can also use Step of the Wind immediately after that Bonus Action.

Level 17: Tiny Prick of Death

When you hit a creature with a dagger you can expend 4 Focus Points to force the target to make a Constitution saving throw, taking 10d12 Force damage on a failed save or half as much damage on a successful one.