nothing is true everything is permitted

Feat: Basic training

At level 3, upon joining the order, you become proficient in the disguise kit and poisoner's kit, and you also receive a hidden blade.

leap of faith

At the third level, you have advantage on creatures that haven't taken a turn, and any creature you hit that is not aware of your presence is a critical. Also, the distance and height of your jumps are doubled

Specialized assassinations

At the ninth level, you get the following specialized assassinations

drop attack

You can jump on a target up to 80ft below you, and the target must make a dexterity saving throw equal to 8 + your dexterity modifier + your proficiency bonus. On a failed save, the target takes your fall damage and your hidden blade damage

wound and roll

If you attack with your hidden blade, you can make the target take a Constitution saving throw equal to 8 + your dexterity modifier + your proficiency bonus. On a failed save, they take the hidden blade damage and are incapacitated till the start of their next turn.

ledge takedown, 

If you are climbing, and someone is on top or climbing 5ft above you. You can make them make a strength saving throw equal to 8 + your dexterity modifier + your proficiency bonus. On a fail, they are thrown from the cliff, taking appropriate fall damage

Weapon bearer

At level 13, you gain proficiency with your hidden blade. On your turn, if you haven't attacked or moved more than half your movement speed, then you can attack. If you hit, you do max damage.

Touch of death

At level 17, you can attack with a hidden blade so piercingly that you force them to make a DC 24 dexterity saving throw on a fail. If the target had fewer than 150hp, it dies instantly if it had more, it takes 150 piercing damage

Skill Proficiencies: +2 to dex