Path of the Fiend

For whatever reason, true evil has sparked an anger bubbling up within mortal beings, catalysing an already growing rage in the hearts of a few. These barbarians gain devilish benefits, channeling their rage into something quite unholy.

Hellfire

Starting when you choose this path at 3rd level, you feel hellish energy bubbling up inside you when you rage. While raging, you can see normally in darkness both magical and non-magical up to 120ft and once per turn you can deal an extra 1d4 fire damage on any attack.

The fire damage increases by an additional d4 at 10th, 13th and 17th level.

Devilish Desire

Beginning at 6th level, you can draw upon your Fiendish power to inflict misfortune upon your enemies. When a creature that you can see succeeds on an ability check or saving throw, you can use a reaction to summon infernal influence forcing them to re-roll it and must use the new roll.

You can use this ability a number of times up to your proficiency bonus per long rest.

Short Temper

Beginning at 10th level, the evil essences within you begin to boil out of control. When forced to make a saving throw against an effect caused by a single creature (such as casting a spell or a monk’s stunning strike), you can use your reaction and expend a use of rage to grant yourself advantage on the saving throw and if the creature forcing you to make the saving throw can see you, they must succeed on Wisdom saving throw (DC equal to 8 + your proficiency bonus + your Strength modifier) or be frightened of you until the end of their next turn. If you are not already raging you can also enter a rage as part of this reaction.

Demonic form

Starting at 14th level, when you enter a rage your body begins to transform into something much more Fiendish: your skin turns a shade of grey, black or red (your choice) and two demonic wings grow from your back. While you are raging, you now have a flying speed equal to your current walking speed and advantage on all intimidation checks.