Descendant of the Courts 

Those who are blessed by greater Fey, born near a gateway to the Feywild, or are a descendant of a Fey entity are known to have the magics of the Feyline Lineage. It's not necessary to be a child of an actual Fey, though those who have such magics are somewhat adopted by a Fey in hopes to bring them back to the Feywild and join the respective Court. 

Credits 

Based on The Feyline Lineage by u/OwlLeNoir and Sorcerous Origin: Fey-Touched by u/SubjectiveSloth on GM Binder.

Voice of the Courts

Being an offspring of the Fey, you know how to understand them and their heritage. At 1st level, you learn to speak, read, and write Sylvan. In addition you gain proficiency in one of the following skills of your choice: Arcana, Deception, or Nature. 

Retaliatory Enchantments

The chaotic nature of the Fey allows you to punish those who resist your charms. At 1st level, whenever a creature targeted by any enchantment spell casted by you saves on the initial saving throw, they take 1d4 psychic damage in retaliation of not becoming charmed. 

This damage increases to 2d4 at 5th level, 3d4 at 11th, and 4d4 at 17th level.

Assistance of the Fey

At 6th level, you can expend two sorcery points as an action to call fey creatures to your aid, summoning 1d4 pixies, 1d4 sprites, or 1d2 quicklings from a small planar portal within 15 feet of you. They understand Sylvan and will obey your first command to the best of their abilities. The fey will inevitably get bored and begin to defy you after 10 minutes and will attempt to escape your company, even after they have been given a command. 

Once you use this feature you must finish a long rest before you can use it again. 

Movement of the Fey

At 14th level, you gain the ability to travel in the preferred method of the Fey. As a bonus action, you can spend 2 sorcery points to teleport to a point you can see within 60 feet. Additionally, after you teleport, you immediately become invisible until the beginning of your next turn. This invisibility ends early if you attack, cast a spell, or choose to end it. 

Superior Ancestry

At 18th level, you gain the following benefits as you crest into the true nature of the fey: 

You gain immunity to the Charmed effect. You can see the true form of any shapechanger or creature concealed by illusion or transmutation magic while the creature is within 30 feet of you within line of sight. When a creature makes a saving throw to end the effects of your enchantment spells, it does so with disadvantage.