Improved Grappling

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

You can grapple a creature as a bonus action

You have advantage on grappling a creature

if you are grappling a creature, you may let go of your grapple as a reaction.

you can make a contested Athletics check and if you pass, can drag a grappled opponent with no movement penalty

 When hitting a creature that is grappled, you can use one of your attacks to instead do one of the following maneuvers.

• You can try to pin a creature grappled by you. To do so, make another grapple . If you succeed, you and the creature are both restrained until the grapple ends. You are not considered restrained in reference to your grappled opponent.
• you can grapple your opponent by the throat. if you do so, the creature is unable to breath and cannot use Vocal components, and can only speak falteringly.
• you can lock your opponent in place from behind and leave them standing pinned. you and the creature are considered Restrained. 
• you can pull on a muscle or use a hold in order to leave your opponent in intense pain. damage is calculated the same as a melee strike, but concentration checks are made at disadvantage.
• you can slam your opponent into the ground as a melee attack. the creature is considered prone for this attack. if you slam the creature into another creature, that creature must make a DC dexterity saving throw or take the same damage.