Spirit of the Secret Names

Your Charisma Score increases by 1, to a maximum of 20

Whenever you make an attack or force a target to make a saving throw, you may spend one of your hit dice and add it to your attack roll, DC, or damage roll, so long as you give the action a special name that you yell out as you do it. You regain the ability to do so at the start of your next turn. If you have any, you may spend DM Inspiration to use one hit die without spending it.