Arrow Mind

You become attuned to the movements of others in your immediate vicinity. For the duration, you do not have disadvantage on ranged attacks when within 5 feet of an enemy. When a creature provokes an Opportunity Attack from you by leaving your reach, you can use a ranged weapon you are wielding to make an opportunity attack against that creature. Finally, if a creature moves to a space within 5 feet of you, you can use your reaction to make an opportunity attack against that creature with a ranged weapon you are wielding.

Adapted from 3e's Complete Adventurer.