These Hands

You have decided in your career that the only weapons you need are the ones you were born with.

Starting at 1st level unarmed strikes do 1 d10 plus strength or dexterity modifier. 

At 3rd level unarmed strikes do 2 d10 plus strength or dexterity modifier.

At 5th  level unarmed strikes do 3 d10 plus strength or dexterity modifier.

At 15th level unarmed strikes do 4 d12 plus strength or dexterity modifier.

At level 20 unarmed strikes do 4 d20 plus strength or dexterity modifier.