Transcendence
When you use the attack action, you can choose to double the amount of attacks you make as a part of that action. When you use this ability, roll a hit die. You lose a number of hit points equal to your roll and your hit point maximum is lowered by the same amount. The number of dice you roll increases by 1 for every time this ability is used. Your hp max and number of dice rolled both reset when you finish a long rest.