You gain the following benefits:

• When you take the Attack action and attack with only a whip, you can use a bonus action to make a melee attack with a light weapon in your offhand.
• Your whip now does a d6 of damage.
• You can choose to not deal damage to a target and instead, grapple a target of size Large or smaller if you hit. The escape DC is 8 + Dexterity Score + Proficiency bonus, which could be challenged by a strength or dexterity saving throw.  You may not use your whip while the target is grappled but can release the whip on your turn to attack or remove the grapple from a target.
• Once per short rest, you may disarm the target instead of dealing damage as an action. The DC to avoid this effect is 8 + Dexterity Score + Proficiency bonus vs a dexterity saving throw.