You gain the following benefits:

• Due to your mastery of movement when wielding a whip, your reach is increased by 5 ft.
• When you take the Attack action and successfully attack with only a whip, you can use a bonus action to make a contested Althletics check with the target(made at disadvantage if the target creature is at least one size larger than you). On a successful check, you can choose to pull the target in a straight line towards you or you can choose to disarm the target.
• While you are wielding a whip, other creatures provoke an opportunity attack from you when they enter the reach you have with that weapon.