Legendary Fighter

You gain one legendary action which you can use at the end of an enemy turn to either shove them (Knock them prone or 5 feet away) or grapple them.

If you take this feet again after lvl 8 you gain an additional legendary action and the ability to use one of your legendary actions on your turn to make an attack roll against an enemy that ended their turn in range of your melee weapon

If after lvl 14 you take this feat again (for a third time) you gain one more legendary action (Bringing you up to max 3) and the ability to once per turn use one of your legendary actions to use legendary resistance.