Starting when you choose this Fight Club at 3rd level, you gain the following additional moxie features:

At 6th level, when you have an enemy creature grappled, you gain half cover against all attacks made against you by a creature you are not grappling. When a weapon attack is made against you, you may use your reaction and spend 1 moxie point to have that creature make the same attack roll with a new roll against an enemy creature you are grappling.

At 11th level, you count as one size larger than you are for the purposes of grappling. In addition, you can move your full movement speed when you are dragging or carrying a grappled creature your size or small.

At 17th level, your master of grappling reaches its peak. While you have a creature grappled, you gain advantage on all attacks against it. Additionally, when you make an unarmed strike or pugilist weapon attack against a creature you have grappled, you score a critical on a roll of 19 or 20.