You've delved into the dark mystery of stealth. You are an agent of shadow, removing those who block you ideals, sometimes even before they know you're there.

Shadow Shuriken

When you take this way you gain proficiency with ninja weapons. Ninja weapons include shuriken, ninjato, tonfa. You may use your ninja weapons with your Flurry of Blows. When you make a ranged attack with shuriken you may spend up to half your level in ki points to throw as many shadow shurikens as ki points spent as well. The shadow shurikens do 1d4 necrotic damage. You do not add your Dex mod to damage with shadow shurikens. Each shadow shuriken may attack a different foe or the same one. Make an attack roll for each shadow shuriken. You may also use this ability without throwing a physical shuriken, In this case you may add your Dex mod to one shadow shuriken damage.

Smoke Bomb

Smoke bomb: As a bonus action spend 2 ki to throw a smoke bomb. The smoke bomb has a range of 30ft and explodes in a 10ft circle. Creatures in the area other than you need to make a dex save or be blinded until the start of your next turn. If you leave a threatened square of a blinded creature you do not provoke an attack of opportunity.

Ninja Flurry

Ninja Flurry When you use flurry of blows with a ninja weapon you may spend extra ki points to grant yourself more attacks. For every 2 extra ki points you spend you gain 1 additional attack in addition to the two that Flurry of Blows grant.

Death Strike

Death Strike: As an action you may forgo all your other attacks to make one attack. You can spend any number of ki points to activate this ability. You gain a bonus to attack equal to the number of ki points spent. If your attack hits roll damage for the attack and then multiply the total by the number of ki points spent. All the damage inflicted by this attack is necrotic.