Versatile weapon master

You are greatly skilled with versatile weapons. while wielding a versatile weapon in both hands you gain the following benefits:

• When you take the Attack action and attack with only a longsword, battleaxe, Trident, warhammer, quarterstaff, or spear, you can use a bonus action to make a melee attack with 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 it deals the same damage type as the weapon or bludgeoning damage (your choice).
• While you are wielding a longsword, battleaxe, Trident, warhammer, quarterstaff, or spear, when a creature misses you with a melee attack you may use your reaction to make an opportunity attack against the offending creature.