While you are wielding a whip you gain the following benefits:

• That weapon deals an extra 1d6 force damage to any target it hits.
• Other creatures provoke an opportunity attack from you when they enter the reach you have with that weapon.
• When you hit a creature with an attack, it must succeed on a Strength saving throw DC 16 or be knocked prone.
• As a bonus action, you can enter a defensive stance that lasts until the start of your next turn. Once per turn while in your defensive stance, you can make one opportunity attack without using your reaction.