Aerial Combat
Many monsters can fly and PCs can use spells and items to gain the ability to fly. Flying creatures have to use the Fly action to move through the air. Performing an especially tricky maneuver (such as trying to reverse course 180 degrees or fly through a narrow gap) might require using Athletics to Maneuver in Flight. Creatures might fall from the sky, using the falling rules. At the GM’s discretion, some ground-based actions might not work in the air. For instance, a flying creature couldn’t Leap.