The Alu-fiend

You have made a pact with a powerful Alu-fiend.

The Alu-fiend is a social butterfly, a being that feeds on attention and demands praise, and even their most staunch critic is considered a potential tool or toy. Feed their desire by garnering attention in their name, or become their latest meal.

Costume Change

Starting at 1st level, the Alu-fiend grants you some of its illusionary magic. You can create an alternate illusionary appearance for yourself that must be a medium sized humanoid with a challenge rating equal to or less than your own base-race. Once you have decided on an alternate appearance, you cannot change it. You do not gain any benefits or special effects from this form, it is simply your 'stage identity.' 

You may activate this ability with a bonus action, and have uses equal to your Charisma modifier. Uses reset on a short rest.

Creatures may try to see through your stage identity with a Wis (Insight) or Int (Investigation) check. The DC is equal to 10 + CHA mod + Proficiency Bonus.

Charming Facade

Starting at 6th level, you have become used to being center stage. Using your action, you can draw on your patron's allure to boost your own charm. Creatures have disadvantage on saving throws against your enchantment spells and charm effects,  as well as disadvantage on checks to resisting watching your Performance checks. Having been witness to the Alu-fiend's allure, you now have advantage on saving throws against charm effects and enchantment spells.

Spotlight

At 10th level, you have mastered performing without your Pact Instrument. You gain proficiency in Cha (Performance) checks and gain a +2 to your Charisma, with a maximum of 22.

Strings Attached

Starting at 14th level, the Alu-fiend has given you enough and now demands their due.

Once per long rest, you can offer the soul of a creature that is Fascinated or Charmed by your performance to the Alu-fiend. The creature makes a Charisma save versus your Spell Save DC. If the creature fails, its Charisma and Intelligence drop to 1 as if suffering from Feeblemind, and its sanity is sacrificed to the Alu-fiend. You gain advantage on all Charisma based checks following a successful sacrifice for the next hour and may add the creature's appearance to your Costume Change feature.

If you do not successfully sacrifice a creature to the Alu-fiend within 1 tenday,  you suffer 1 level of exhaustion for each tenday you ignore your debt to your patron.