You learn to finesse whips as if they were an extension of your own body. You gain the following benefits:

• You gain proficiency with whips
• 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 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 slashing damage.
• While you are wielding a whip other creatures provoke an opportunity attack from you when they enter your reach.