Strangler

You’ve developed the skills to constrict and suffocate grappled opponents. You gain the following benefits:

• Creatures you are grappling have disadvantage on attempts to escape the grapple.
• You can use your action to try to suffocate a creature grappled by you. To do so, make another grapple check. If you succeed, the creature is suffocating and can't breathe, speak or cast spells with verbal components until the grapple ends.