You have mastered the ways of the whip and the intricacies of such an exotic weapon. You gain the following benefits:

When you hit with a melee attack using a whip you deal an additional 1d4 damage of whatever type the whip deals.
While you are wielding a whip, other creatures provoke an opportunity attack from you when they enter your reach.
You have advantage on ability checks and attacks made to disarm or grapple enemies when using a whip as a part of the check or attack.