Ball and Chain Soldier (fighting style)

Prerequisite: Proficiency with the ball and chain

Ball and Chain Soldier is a fighting style. While you have this style, you gain these benefits:
     You've mastered wide, sweeping attacks with the ball and chain. While you wield this weapon in two hands, it gains the reach property and you add a +1 shield bonus to your AC.
     Whenever a creature enters a 10-foot radius of you on its turn, you can use your reaction to make one attack with the ball-and-chain targeting that creature.