This is a variant of u/jivatum 's succubus subclass 

Prerequisites: 14 CHA

A succubus is a demon in female form, or supernatural entity in folklore, that appears in dreams and takes the form of a woman in order to seduce men, usually through sexual activity. The male counterpart to the succubus is the incubus. There is no specific patron for this subclass so you must pick your own. Consult with your DM but the patron must be evil.

Undeniable Allure

Upon taking this archetype at level one, you gain access to Undeniable Allure. If you are an Aasimar and have access to Radiant Soul or Necrotic Shroud this ability replaces them. Activate-able with 1 action and last 1 min. Upon activation you take the form of an otherworldly beauty, all creatures within 10 feet must make a charisma saving throw of your spell DC or be charmed by you. The charm is consistent with the charm condition. The damage boost from Undeniable Terror does not apply in this form.

While Undeniable Allure is active you may spend an action to transition into Undeniable Terror form. Your beautiful form is transitioned into a terrifying nightmare. Flightless imp-like wings spring for your back and your eyes become pools of darkness as you let out a blood curdling scream. All creatures within 10 feet must make wisdom saving throws contested by your spell save DC or be terrified of you. If they were already charmed by you with Undeniable Allure they automatically fail the saving throw. If a creature previously succeeded their saving throw against Undeniable Allure, they are wise to your tricks and have advantage on the saving throw. While in this form, creatures that are frightened by you take your character level in psychic damage when they start their turn within 10 feet of you. The duration does not reset upon transitioning to Undeniable Terror.

Once you use this ability you can't use it again until you finish a long rest.

Devilish Trickery

At 1st level, you obtain the “Mask of Many Faces” invocation. This does not count towards your known invocations but cannot be switched for another invocation. You also become proficient in the persuasion skill, gain expertise if already proficient, but no benefit if you already have expertise

Succubus/Incubus Spells

 

SPELL LEVEL	SPELLS
1st	charm person, command
2nd	calm emotions, silence
3rd	haste, slow
4th	confusion, compulsion
5th	modify memory, mislead

Overwhelming Charm

Starting at 6th level, you can exert your influence and charm to overwhelm a creature's senses. Using an action, you stare into a target and speak directly to their psyche. The target must make a wisdom saving throw or they fall under your overwhelming charm. The target makes the saving throw with advantage if they are currently in combat.

While under overwhelming charm, your suggestions, except for violence, are viewed in a positive light, and any action you and your allies take, except for violence against the charmed, are ignored. The target makes a new saving throw if harmed by you or your allies. This effect ends when used again or after a number of hours equal to your charisma modifier.

You must complete a short or long rest to use this ability again.

Disarming Presence

Beginning at 10th level your demeanor and appearance puts all potential foes at ease, making it easier to surprise your enemy. You now add your charisma modifier to initiative checks. If you act before an enemy in combat they are considered surprised until the end of your turn, granting you advantage on your first attack or imposing disadvantage on a saving throw against your spell.

Sycophants Embrace

At level 14, your understanding of the desires and needs of others grows to a new level allowing you to truly break someone's independence. Make a melee spell attack against a creature(it automatically succeeds if the target is unconcious or willing) and reach into their mind, discovering their greatest desires and weaknesses. The target takes 5d10 psychic damage as you exploit this weakness, tormeting their mind. After a successful attack, you must complete a long rest before embracing again.

If this attack would reduce a target to 0 hit points, it instead reduces them to 1 hit point and their previous desires are now replaced with a sycophantic desire to fulfill your wishes. A sychophant is unable to regain any hit points while in this state and can only be released by a remove curse spell or again being reduced to 0 hit points.

A sycophant is unable to attack or cast spells, but retains all other knowledge and skills. The sycophant will follow any direct commands given by you without regard to its own safety. If given no direct commands, they will attempt to continue their normal behavior while seeking any opportunity to please you.