You have mastered the use of a particularly exotic weapon in both accuracy of your strikes and in keeping your enemies at bay with its reach. You gain the following benefits:

• You get a +1 to attack and damage rolls for primary attack actions made with a whip. 
• When you take the Attack action and attack with only a whip, you can use a bonus action to make a melee attack with the pommel of the weapon. This attack uses your Strength modifier. The weapon’s damage die for this attack is a d4, and it deals bludgeoning damage. This bonus action attack can only be used if the target is within 5 feet.
• While you are wielding a whip, other creatures provoke an opportunity attack from you when they enter your reach.