Burning Rage Barbarian

This subclass lights you on fire making all your attacks deal burning damage and at later levels will even heal you.

Flaming Furry

Starting when you choose this path at 3rd level, your anger will manifest as flames that engulf you and everything around you and you will deal fire damage will raged but after your rage is over you will still be on fire and must take a turn to put yourself out but until you do you will take 1d6 fire damage but will still deal fire damage.

Smoldering Intensity

Beginning at 6th level, you can’t be froze, intimidated, or killed  while raging (if you are dropped to zero hp while raging you will die when your rage ends instead).

Fires Of Rejuvenation

Beginning at 10th level, you are passively healed 1d6 hp until your rage is over.

The Beast From Within

Starting at level 14, Using all the rage you have you can shape your rage into a construct of fire that is shaped like and has all the abilities of one monster you have killed. This ability can only be used once a day and afterwards you can't rage for the rest of the day. If you try to attack with a weapon instead of the beast while using this ability the beast will break free from your control and will target you. It will also break free if it goes farther than 30ft from you