When determining your character’s ability scores, increase one score by 2 and increase a different score by 1, or increase three different scores by 1. You can't raise any of your scores above 20.

Equus Monoceras mature and age at about the same rate as humans.

Your creature type is fey, rather than humanoid.

You have advantage on saving throws against spells and other magical effects.

You can use your head and horn to make unarmed strikes. If you hit with it, you deal piercing damage equal to 1d4 + your Strength modifier. 

Whenever you make a long or high jump, you can roll a d8 and add the number rolled to the number of feet you cover, even when making a standing jump. This extra distance costs movement as normal.

You have proficiency in Performance and Persuasion skills, and and you have proficiency with one musical instrument of your choice.

You can speak, read and write Common and Sylvan.

The Equus Monoceras innate spellcasting ability its Charisma (spell save DC 16). It can innately cast the following spells, requiring no material components:

At will: charm person, Tasha's Hideous Laughter
3/day each: confusion, enthrall, suggestion
1/day each: hallucinatory terrain, Otto's irresistible dance