Euriel’s Embrace

You can use a bonus action to unleash Eluriel’s energy from within yourself. Two luminous, spectral wings sprout from your back temporarily and, until the transformation ends, you have a flying speed equal to your walking speed. Once on each of your turns, you can deal extra radiant damage to one target when you deal damage to it with an attack or a spell. The extra damage equals your proficiency bonus.

Aasimar with the Radiant Soul Revelation do not gain the ability; instead, they gain a flying speed of 60ft, and the extra damage equals *double* their proficiency bones.