You gain the ability to sprout a pair of leathery wings from your back. While you aren’t encumbered by weight, you gain a flying speed of 10 meters. You can create these wings as an action or as a reaction to falling. They last until you dismiss them on your turn (no action required).
You can’t sprout your wings while wearing armor unless the armor is made to accommodate them, and clothing not made to accommodate your wings might be destroyed when you manifest them.