Gravewalker

You were an Oathbreaker Paladin until you were slain. Your former god then revived you and made you their Gravewalker. A assassin sent by a god to do their dirty work. Hoping to maybe regain your freedom one day. You are sent on missions by this god to kill anyone who defies them. When you were revived your soul was split from you body. This revival caused your abilities to be enhanced and your will to be strengthened to a point where you can break the will of others.

 

(Inspiration,  Middle-Earth: Shadow Of War)

(Also for all charming spells and stuff the creatures are frightened but have the effects of charming. Which means you have to have immunity to the frightened condition for them not to work on you. That also means that if you and you companions are fighting they do not have advantage but if you and your companions aren't fighting it they do have advantage.)

Channel Divinity

When you take this oath at 3rd level, you gain the following two Channel Divinity options.

• You gain the ability to turn your soul inside of you to spectral weapons for 1 hour. These weapons are +1 and are magical. These weapons also do 1d6 extra psychic damage.
• You can make your soul into a copy of yourself who appears and fights for you for one minute or until it dies. Its armor class is 14+ your proficiency bonus, and 1 hit point. It can attack once every round and uses your initiative. Its attacks do psychic damage. It has a speed the same as yours and all modifiers are the same.

These abilities are regained after a long rest.

Shadow Strike

Starting a 7th level when you miss a ranged attack from 15ft. or more you can teleport to an empty space next to the target and make one melee attack against them. This feature only works if you are within 100ft. of the target. You can use this ability a number of times equal to your proficiency bonus. All uses are regained after a long rest.

Destroy Will

Starting at 15th level your ability to destroy will gets stronger. When any creature is at one fourth hit points and is within 30ft of you, you can force them to make a wisdom save against your paladin save DC. If it fails the creature becomes your servant following your every command for 1d10 days. If they succeed you get a side effect based on their challenge rating.

CR 1-10:You immediately drop to one hit point and have disadvantage on all rolls for 1d4 rounds.

CR 11-19: You immediately drop to zero hit points and have one failed death save. If you get back up you have disadvantage on all rolls for 1d8 rounds.

CR 20-30: You immediately die no abilities or spells can bring you back for 1d8 days.

The Destroyer Of Minds

Your will is strengthened so much you gain the following benefits to your Destroy Mind Feature. 

• You can instantly gain control of a creature with a challenge rating less than 5 that is within 30ft. of you no roll no anything. 
• The time a creature is controlled by you is increased from 1d10 days to 1d6 weeks.
• Instead of instantly dying when failing to control a creature from CR 20-30 you just drop to two failed death saves.