Path of the Oni

Some barbarians aspire to be become like the oni, creatures of pure fury, hatred, and physical prowess. Such barbarians might make a deal with an oni to take on some of their power, while others might discover ancient rituals and rites to assume some of the might of the oni. Regardless of their methods of obtaining their powers, these barbarians are terrifying to behold in battle, and are often surrounded by crackling bursts of electricity. These barbarians are usually reckless and savage, some taking after their namesake, drinking profusely, inflicting torment wherever they go, or even devouring humanoid meat (perhaps as part of a deal made to obtain their powers). Other barbarians might use this power for good, despite the negative connotations surrounding their path.

Visage of the Oni

Your body changes, you grow a pair of horns, and your skin turns a deep shade of red or blue. You gain proficiency in the Charisma (Intimidations) skill. If you are already proficient in the Charisma (Intimidations) skill you gain expertise with that skill.

Lightning Speed

You take on a supernatural quickness. While raging, your speed is increased by 10 feet.

Lightning Strike

Lightning surges around you when you enter your rage. While raging, the first melee weapon attack or unarmed strike you hi with each turn deals lighting damage equal to 1d6 + half of your barbarian level.

Thunderous Roar

Whenever you enter a rage, you let out a thunderous roar. All creatures of your choice within 20 ft. of you that can hear you must make a Constitution saving throw equal to 8 + your proficiency bonus + your Constitution modifier. On a failure, a creature takes 4d6 thunder damage and is deafened for the next minute. On a success, a creature takes half damage and is not deafened. A deafened creature can make a new saving throw at the end of each of it's turns.

Horrifying Presence

When you enter your rage you appear as though you have taken on the form of a horrifying demon. When you end you rage, each creature of your choice withing 60 feet of you that can see you must succeed on a Wisdom saving throw equal to 8 + your proficiency bonus + your Constitution modifier or become frightened of you for 1 minute. A frightened creature can repeat the saving throw at the end of each of it's turns. ending the effect on a success.

Stunning Strike

Your rage is accompanied by horrid bursts of lightning. When a creature takes damage from your Lightning Strike feature you may use a bonus action to attempt to stun that creature. The creature must make a Constitution saving throw equal to 8 + your proficiency bonus + your Constitution modifier. On a failed save the creature takes an additional 1d6 + half of your barbarian level of lightning damage and is stunned until the end of it's next turn. On a success, the creature takes half damage and is not stunned. Once a creature has been stunned by your Lightning Strike, it can not be stunned by this feature again for the next 1 minute.