Trained in stealth and destruction these monks are masters of finding targets and ending them quietly.

Dark Fire Arts

Starting when you choose this tradition at 3rd level, you can use your ki to duplicate the effects of certain spells. As an action, you can spend 2 ki points to cast Darkvision or Pass without Trace without providing material components.

In addition, whenever you hit a creature with one of your unarmed strikes including the ones granted by your Flurry of Blows it counts as the produce flame cantrip. Also your ranged attacks made by deflect missles become the flame bolt cantrip.

Shadow step

At 6th level, you gain the ability to step from one shadow into another. When you are in dim light or darkness, as a bonus action you can teleport up to 60 feet to an unoccupied space you can see that is also in dim light or darkness. You then have advantage on the first melee attack you make before the end of the turn.

Cloak of Dark fire

Starting at 11th level, you have learned to become one with the flames. You are ristant to fire damage and can spend 5 Ki points to cast wall of flame as an action.

Spark of Opportunity.

Upon reaching 17th level, you can exploit a creature's momentary distraction when it is hit by an attack. Whenever a creature within 5 feet of you is hit by an attack made by a creature other than you, you can use your reaction to spend 4 ki points to make an unarmed attack against that creature, attack counts as produce flame cantrip.