You've learned to use the speed and agility of a whip, using it to your advantage letting you make sharper more precise attacks. You gain the following benefits:

You become proficient with a whip if you aren't already.

Before you attack using your whip you can take a -5 penalty to the attack roll, if the attack hits add +10 to the attack damage.

Using your action you can attempt to disarm a target within the reach of your whip, contest the target using your dextarity (Acrobatics). If you win the contest knock one weapon out of the target hand. The weapon you disarm cannot be a shield.

Using your action you can attempt to grapple a target creature, the target creature must be no more than one size larger than you and within reach of your whip. You contest the target creature using your dextarity (Acrobatics). If you win the contest you successfully wrap your whip around the target, while your whip is around the target creature you can either use your bonus action to knock it prone or pull the creature 5ft towards you.