Dagger Of Shadows

These Assassins are mostly known as "Stalkers of the Dark" which target people mostly at nighttime or in a dark surface, this is not because light weakens them it's because it's just easier to finish the job in the dark.

Dagger of Darkness

At Lvl 3 you gain a key feature to your subclass which is the Dagger of Darkness, this weapon can appear at will and disappear at will, this dagger is a dagger that deals necrotic damage and counts as a Spell Casting Focus to cast certain spells, this dagger can be used to attack as a bonus action and also if you are in the dark this dagger causes you to heal half the damage you do to a target. You also gain 60 Ft of Darkvision, and you can also see-through magical darkness.

Spellcasting

At Lvl 3 while the Dagger of Shadows is summoned you are allowed to cast the spells Misty Step and Darkness which you can use each 2 times.

Body of Shadows

At Lvl 9 as a reaction twice per long rest you can turn your body into shadows, while in this form you are immune to any type of slashing, piercing and bludgeoning damage, this lasts till the end to your next turn.

Shadow Strike

At Lvl 13 once per long rest when striking someone that is in a dark area or dim light you can choose to deal double the damage of the attack roll.

Soul Of Darkness

At 17th Lvl Once per week as a bonus action you can let your Dagger engulf you causing you to get stronger, for 1 minute you become Immune to nonmagical Bludgeoning, Piercing, Slashing and immune against Necrotic damage while also adding a 1d8 damage dice Each time you roll a damage roll. You also gain a special ability which can only be used during the form and end it.

Blast of a Million Shadows - The user channels the full power of the Dagger sending a wave of dark energy at a group or a target, the target must succeed a Dex saving throw of 20 with a AOE of 20 and a range of 60 FT and if failed take 10d10 Necrotic Damage and must roll a Wisdom save of 18 or be frightened for 4 Rounds, If the target succeeds they take half the damage and don't have to roll to resist being frightened.