Chain Whip Master

After years of training you have finally mastered the way of the chain-whip. You gain the following benefits:

• You gain a +1 bonus to attack rolls you make with a chain-whip.
• While you are wielding a chain-whip, such as The Vampire Killer, or a similar weapon, such as a flail, or whip, other creatures provoke an opportunity attack from you when they enter the reach you have with that weapon. 
• You have advantage on ability checks and attacks made to disarm or grapple enemies when using a flail-whip as a part of the check or attack.