a assassin that Trained in the use of poison and poison magic

summons of the shadows

At the 15th level you call upon the shadows and summon a shadow assassin a true assassin of the shadows

(that lasts 5 minutes) this can only be used every 5 in games hours

Tricks of the Trade

At the 3rd level, gain proficiency with disguise kits, poisoner’s kits. Your proficiency with poisoner’s kits can apply to Intelligence (Nature) checks and Charisma (Persuasion) checks to obtain or harvest poisons.

Your resourceful efficiency allows you to craft disguises and poisons at half the cost and time required. You have resistance to poison damage due to your time spent building up your tolerance. You may also apply poison to a weapon or ammunition as a bonus action instead of an action.

Studying behaviour has given you a cerebral ability to influence others. You may use your Intelligence modifier instead of your Charisma modifier when you resolve a Charisma-based skill check.

Assassinate

At the 3rd level, your attacks gain advantage against creatures who have not yet taken a turn in a combat encounter. Your attacks become critical hits when hitting creatures who are surprised. You can also add your proficiency bonus to Initiative rolls.

Infiltration Expertise

Starting at 9th level, you gain proficiency with forgery kits. You roll skill checks with advantage to impersonate or adopt fictional personas or impersonate individuals if you observe the subject’s speech, handwriting, mannerisms, or other notable traits for ten minutes.

Poison at night can be as deadly as an army at noon. You roll Sleight of Hand checks with advantage to avoid detection when poisoning food or drink.

Just Business

At 13th level, your Sneak Attack dice become d8’s instead of d6’s. Treat ones and twos rolled on your Sneak Attack dice as if they are threes.

Death Strike

At 17th level, you master the art of killing or crippling enemies. When you attack and hit a surprised creature, it makes a Constitution saving throw (DC 8 + your Dexterity modifier + your proficiency bonus). Double the damage of your attack against any creature that fails this saving throw. Regardless of whether the creature passes or succeeds at this saving throw, its Initiative value in the turn order is reduced by 2d6 + your Dexterity modifier for the remainder of the combat encounter.

Master of the night

Assassins are the predators of the night as they have trained to see and fight in the shadows like no other

ones assassin has reached its 8th level you have advantage on a Dexterity Stealth check during the night

  ones assassin has reached its 8th level you have boosted strength during the night