You have mastered the use of the whip. 

• You gain profiency with whips if you aren't already proficient. 
• When you make an attack with your whip and you hit, you can try to trip the target. The target has to succeed on a Strength saving throw equal to 8 + your profiency bonus + your Dexterity modifier or be knocked prone.
• Alternatively, when you make an attack with your whip and hit, the target has to succeed on Dexterity saving throw equal to 8 + your profiency bonus + your Dexterity modifier or be pulled 5 feet towards you.