You’ve developed the skills necessary to hold your own in close-quarters grappling. You gain the following benefits:

• If a creature successfully grapples you while you have a free hand, the creature is immediately grappled by you at the same time, and cannot escape until you are released from its grapple.
• Creatures that are immune to the grappled condition can now be grappled by you, but they have advantage on the grapple check.
• If you grapple a creature which has the Surprised condition, it will be Restrained until it breaks free from your grapple.