Your Dexterity increases by 2 and any other ability score of your choice increases by 1

Once per long rest you can use you action to retrain a humanoid  of medium or small size the target must make a Dexterity saving throw that equals 12 + your proficiency bonus on a failed save or be restrained to escape the restrainment the restrained creature  must succeed on a DC 10 Dexterity saving throw, at the start of each of the restrained creature’s turns it take bludgeoning damage equal to your dexterity modifier ( minimum of one ) Unlike normal restrainment  the creature that is restrained has no disadvantage on attack rolls, this feature has no effect on any creature that has immunity to the restrained condition, the condition   if the restrainer takes more than 15 damage of any type they must succeed at a DC 15 constitution saving throw or end the grapple, the condition also ends if the restrainer is knock prone, unconscious, stunned restrained fraightened of the target or petrified