Trainig in the depths of the Underdark, a monastery focused on cleansing the evil in a city or even an assassins guild, you have honed your abilities to impose your ki onto another living creature or even creatures with a semblence of life. Using shadows to your advantage and the deadly sudden strike, you get the upper hand in battle using weapons named Assassin's tools and extending the flow of your natural Monk spirit into this deadly blades.

 

Learning to act before the enemy, walking between the shadows and concoting mortal poisons you lean into battle with the keen eye of the creatures that pray upon the weak and lethal intent.

Shadow Disciple

When you choose this sub-class at 3rd Level, you gain proficiency with 2 weapons of your choice, they must be light weapons, with the Finesse property. This weapons are treated as your Assassin's tools.

Additionally you can spend 2 ki points as an action to cast pass without a trace, silence, Alter self and invisibility.

you are at your Deadliest whenever you use any of your weapons. Once per turn, whenever you hit with an attack using with your Assassin's tools you can add an aditional unarmed strike die to the damage.

Shadow Sneak

Upon Reaching 6th level in this Class, 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. whenever you use this ability you have advantage on the next attack you make with your Assassin's tolls until the end of your turn.

Aditionally you can add your wisdom modifier to initiative rolls. As you understand to an extent the chaos of batlle and can act before your enemies.

Learning the secret ways of the assassins troughout history, you gain proficiency in the poisoner's kit if you don't have it alredy.

Death Strike

Upon Reaching 11th level in this Class, you learn to be more effective when getting the drop on your enemies, whenever you hit a creature with your Assassin's tools and you have advantage on the attack, you can spend 3 ki points once per turn, to make the attack a critical hit.

Aditionally you gain proficiency with 2 more Assassin's tools witch can be any weapon that doesn't have the heavy propierty

Life Reaper

Upon Reaching 17th level in this Class, you have honed the manipulation of the fine line between life and death. Whenever you score a critical hit using your Assassin's tools, you can spend 3 ki point to deal an additional 8d8 necrotic damage and heal for Half that amount.

This necrotic damage does not count in the original attack, so it doesn't double as a critical hit.