Fashionably Late

At the start of battle while initiative is being rolled, you may choose to go last. If you decide to do this, the battle begins without you. During the first round of combat, you are transported to an extradimensional space until your turn arrives. While in this extradimensional space, you are enwreathed in glamorous magic that changes your clothing and/or armor to an appearance of your choosing. Other than that, you are not able to take any reactions or be targeted because you are not yet on the battlefield.

When your turn arrives, you appear in an unoccupied space within 30 feet of an ally. As an action, when you appear a wondrous light emanates from your beautiful countenance as you sing an enchanting song to announce your arrival. Enemies caught within the 30 foot radius around you must succeed on a Constitution saving throw against your spell save DC or become blinded by the light, or they must succeed on a Wisdom saving throw against your spell save DC or become charmed by the song (your choice, and the decision will be the same for every enemy). Creatures who do not or can not see the light are unaffected by the blindness, and creatures immune to charm effects are unaffected by the charm. At the end of each of its turns, an enemy can make another saving throw. On a success, the spell ends.

This ability can be used once every long rest.