You have trained and perfected the Serpetinn Whip style of combat, gaining the following benefits when using a whip:

• You become proficient with whips, if you are not already.
• You can use your action to make one weapon attack with a whip against one target at most one size larger than you, on a success the target is considered grappled. At the start of the target's turns, while it remains grappled, it takes 1d4 bludgeoning damage.
• While wielding a whip other creatures provoke an opportunity attack from you when they enter your reach.
• When use your Attack action with a whip and hit at least one attack, you can use your bonus action to make another attack with the same whip.