Every eladrin court has a song they play. Songs of emotion, filled with power and fey magic. When you take this feat, choose winter, summer, spring, or fall. As an action, you can begin to sing this song, gaining a different benefit depending on which season you chose for 1 minute or until you become incapacitated. If a song requires a saving throw, the save DC is equal to 8 + your proficiency bonus + your Charisma modifier.

Winter. The winter court’s song is one of lonely winters and soulless nights. Each creature that can hear you within 30 feet of you must make a Charisma saving throw or gain disadvantage on ability checks and Wisdom saving throws for the duration.

Summer. The summer court’s song is one of unfettered energy and bold action. For the duration, when you make an attack roll for the first time on your turn, you can choose to have advantage on that attack roll. If you do, the first attack against you before your next turn has advantage.

Spring. The spring court’s song is one of life and joy. For the duration, whenever a creature regains hit points within 30 feet of you, you can use your reaction to grant each ally you choose within 30 feet of you that can hear you a number of temporary hit points equal to twice your proficiency bonus.

Autumn. The autumn court’s song is one of peaceful days and softly falling leaves. For the duration, whenever a creature that can hear you within 30 feet of you makes an attack roll, you can use your reaction to force that creature to make a Wisdom saving throw. On a failed save, that creature’s attack fails and it can no longer make attacks against the target of the attack until its next turn.

You can sing your song a number of times equal to your proficiency bonus, and regain all expended uses of it when you finish a long rest.