Base Class: Warlock
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Level 3: Binding Contract
Starting at 3rd level you learn to empower your speech with the silver tongue of the devil you formed your contract with. Whenever you make a persuasion check you can use one charge to force the target to make a Wisdom saving throw or fall under the effects of the Suggestion spell. If the target succeeds on the saving throw you do not expend a charge. You get a number of charges equal to your proficiency bonus and they all restore on a long rest.
Level 3: Silver Tongue
At 3rd level you gain proficiency in persuasion and deception. If you are already proficient in both of these you can get expertise in one.
Level 6: Impish Demands
At 6th level your charm continues to grow to the level of those you have contracted with. Whenever you successfully use your Binding Contract feature you can psionically lash out at those surrounding that creature. If there are more creatures within 30ft of your charmed creature they must also make a Wisdom saving throw or become charmed under the effects of the Suggestion spell. You can target additional creatures equal to your Charisma modifier per use of this ability.
Level 10: All Along
At 10th whenever you use the make a Deception check you can force the target to make a Wisdom saving throw or fall under the effects of the Modify Memory spell. If the target succeeds on the saving throw it has no idea you attempted to modify its memory and you keep your charge. Additionally when speaking into it's mind to modify its memory your speak is intelligible by any creature no matter what languages it speaks. You have one charge of this and it restores after finishing a long rest
Level 14: Master Manipulator
At 14th level as a reaction to using either Binding Contract or All Along you can force a target to have disadvantage on their saving throw for both All Along and Binding Contract.
Level 14: Infernal Headache
At 14th level as a bonus action you can force a target of your Binding Contract or All Along to end the condition early. By doing this the target of Binding Contract stops doing their suggested task, or the target of All Along remembers everything you replaced. When you use this bonus action to end their condition in this way they take Psychic damage equal to 8d12. You can only use this bonus action once per long rest and all uses restore on the end of a long rest.
Level 3: Additional Spell List
3rd level. Vicious Mockery, Command, Charm Person, Mind Spike, Crown of Madness
5th level. Counterspell, Incite Greed
7th level. Confusion, Phantasmal Killer
9th level. Dominate Person, Synaptic Static