Juggernaut

Hardy and resilient, you gain the following benefits:

•Your Constitution score increases by 1, to a maximum of 20.

•Your hit point maximum increases by an amount equal to your level. It increases by 1 again each time you gain a level.

•You can use your bonus action to spend a hit dice and regain hit points equal to the result of the roll plus your Constitution modifier. In addition, as a reaction when you roll a death saving throw, you can spend a hit die and add the result of the roll to the  total. You can use hit dice in combat an amount of times equal to your Constitution modifier, regaining the ability to do so after a long rest.