Polearm Master Feat
You can keep your enemies at bay with reach weapons. You gain the following benefits:
Prerequisite: Proficiency with a glaive, naginata, guandao, halberds, pike, long staff, monk's spade, quarterstaff, khakkhara, spear, harpoon, tepoztopilli, dervish spear, or wolf-brush
- When you take the Attack action and attack with a listed weapon, you can use a bonus action to make a melee attack with the opposite end of the weapon; this attack uses the same ability modifier as the primary attack. The weapon's damage die for this attack is a d4, and the attack deals bludgeoning damage.
- While you are wielding a listed weapon, other creatures provoke an opportunity attack from you when they enter the reach you have with that weapon.
Source: PHB'14 (modified)
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