Polearm Savant

You've honed fighting with hafted weapons, including glaives, halberds, pikes, quarterstaffs, or any other similar weapons.

Creatures entering your threatened area provoke attacks of opportunity while you are wielding a hafted weapon.
You may expend your bonus action to make a haft attack after taking the attack action with a hafted weapon. This attack uses the same attribute modifier as the primary attack and inflicts a d4 bludgeoning damage.