Fighting Styles

Polearm Master

You treat the following weapons as if they have the long weapon property: Hunting spear, Spear, Trident, Quarterstaff, War spear.

While you are wielding a long weapon, hostile creatures provoke an opportunity attack from you when they enter your reach. You must make this opportunity attack with a long weapon that you are wielding. If you hit the target, this opportunity attack is an automatic critical hit if the triggering creature moved more than 30 feet this turn, if it has taken an action or bonus action that changes its speed (such as the dash action), or is benefitting from a spell or effect that temporarily increases its speed (such as the haste spell).