NULL Soldiers are the superhuman outcome of the NULL program. Abducted at childhood and subjected to magical procedures that alter their perception of time. As well as being extensively trained in their weapon of choice; the katana. NULL soldiers use their supernatural abilities and second-to-none skills to quickly cut down all in their way.

Disturbed Lines

Being trained in the use of the katana (longsword) since childhood. at 3rd level you gain proficiency with the katana and it counts as a monk weapon. You can also use the attack action with your blade while it is sheathed by performing a Iai cut, doing so will give advantage to the attack or damage roll. Additionally you can sheathe your katana at the end of your turn with a free action.

Overdose

The experimental procedures you underwent have altered your perception of time. you can use dodge as a reaction at the cost of an additional Ki point. You gain  the ability to use the Deflect Missiles feature with your sword. Using Deflect missiles with this feature allows you to further decrease the damage by your proficiency modifier and you can make the Deflect missiles attack without using Ki points.

Rain on Brick

NULL soldiers are trained to make use of their surroundings to benefit them in battle. At 6th level you become proficient with improvised weapons and can use your martial arts die for the damage of thrown improvised weapons. You can move in non-magical difficult terrain as if it was normal terrain.

Breath of a serpent

Your NULL abilities have become so potent you begin to alter time around you. You can use spend an action and 2 Ki points to use the Dragon dash ability to move 20 feet in a straight line, any creature in your path takes 3d10+Dex force damage. you can use an additional Ki point to increase the damage by 1d10.

Hit the Floor

You achieve complete mastery of your NULL abilities. Your mind and perception of time are warped beyond understanding and your presence distorts time around you. You cannot be surprised and gain advantage on initiative and all Dex and Con saving throws. At the beginning of combat, before initiative is rolled you can use the dragon dash ability for free. You can spend 5 Ki points to cast foresight on yourself.