Jsk Feats:Whip Mastery

Your skill with a whip allows you greater benefits when using one.
 * When you hit a target with a whip, you deal an additional 1d4 damage.
 * When you make an attack roll with a whip against a creature that is wielding a shield, you gain a +2 bonus to your attack roll.
 * When a creature uses its movement to enter your attack range while wielding a whip, you can use your Reaction to make an opportunity attack against that creature using the whip you are wielding.
 * You can use your whip to interact with an object, such as pulling a lever or opening a door. With your whip in hand, the range at which you can interact with an object is increased to the range of your whip. The DM determines the extent at which you can interact with an object using a whip.