Aura of Challenge

You let out a mighty challenge that creates a 10 ft. aura that challenges each creature within it to fight you. Whenever a creature starts its turn within the aura it must make a Charisma Saving throw, a creature you have damaged since the start of your last turn has disadvantage on the save. On a failed save the creature must spend its movement getting close enough to you to make an attack and must spend its action attacking you. On a successful save a creature's movement is halved and if it makes an attack against anyone other than you it makes the attack with disadvantage.

If you have 18 levels in Paladin, the aura's base radius increases to 30 ft.