Covering Fire

Making haphazard shots to dissuade enemies, you force opponents onto the defensive by unleashing death from above so an ally can move into position.

Choose a number of creatures equal to your proficiency bonus that you can see within your weapon’s normal range. Until the start of your next turn, a chosen creature’s movement does not provoke opportunity attacks from creatures you can see as you pelt the area nearby with missiles. 

For each opportunity attack a chosen creature would have otherwise provoked, you expend one piece of ammunition or thrown weapon.