Path of the Arc Striker

Arc Striker barbarians are the ones to always throws the first hit, they take a lesson from monks, preferring the use of their fists rather than weapons, though incorporating weapons are not a rare sight.

Blitzrage

Starting when you choose this path at 3rd level, you embody the power of the Blitz, your fists, or weapons, emit a static charge that dances onto any enemy you manage to strike. Your attacks do an extra 2d4 lightning damage. This feature is usable once per round and activates on the first strike you hit.

This damage increases as you level up, becoming 3d6 at 10th level, 4d6 at 14th level, and 6d6 at 18th level.

Striker Abilities

Some of your Storm Striker features and abilities require your foes to make saving throws, the DC of which is calculated by: DC = 8 + your proficiency bonus + your strength modifier.

The Oncoming Storm

Beginning at 6th level, you can choose to either take the Thunder Clap or Lightning Strike feature, both these features are usable once per round as an action while in Blitzrage, you can perform the action you chose a number of times equal to your Constitution modifier. Each feature is detailed as followed:

Thunder Clap: As an action, you clap your hands together, or any other means to perform a clap-like action. Any creature within a 10ft radius of you must make a Constitution saving throw, on a failure, they take 5d4 lightning damage plus your Strength modifier.

Lightning Strike: As an action, you move 15ft in a straight line towards a hostile enemy, any creatures with 5ft of the straight line must make a Dexterity saving throw, or be knocked prone on a failure. Should the line be blocked by a creature or end directly in front of a creature, the creature must make a Dexterity saving throw, and take 2d6 lightning damage plus your strength modifier.

Once you use all uses of this feature, you must take a long rest to regain them.

Lightning Strike

As an action, you move 15ft in a straight line towards a hostile enemy, any creatures with 5ft of the straight line must make a Dexterity saving throw, or be knocked prone on a failure. Should the line be blocked by a creature or end directly in front of a creature, the creature must make a Dexterity saving throw, and take 2d6 lightning damage plus your strength modifier.

Thunder Clap

As an action, you clap your hands together, or any other means to perform a clap-like action. Any creature within a 10ft radius of you must make a Constitution saving throw, on a failure, they take 5d4 lightning damage plus your Strength modifier.

Rageful Nimbus

Beginning at 10th level, you can choose between the following features:

Electric Slam: When you enter your Blitzrage, you can move 15 feet and slam at the ground, any creature with a 15 feet radius makes a Dexterity saving throw, on a failure they take 4d8 plus your strength modifier in lightning damage.

Fully Charged: When you enter your Blitzrage, you gain temporary hit points equal to your constitution modifier times your barbarian class level and resistance to lightning and thunder damage.

Electric Slam

When you enter your Blitzrage, a bolt of lightning picks you up into the sky and throws you into a space that was 15 feet from your previous position, to decimate your foes. When you enter your Blitzrage, you can move 15 feet and slam at the ground, any creature with a 15 feet radius makes a DEX saving throw, on a failure they take 4d8 lightning damage plus your strength modifier.

Fully Charged

When you enter your Blitzrage, a flash of lightning appears as your body is coated in a sort of rejuvenating armour of lightning that dances over your body, creating a protective circuit. You gain temporary hit points equal to your constitution modifier and resistance to lightning and thunder damage.

The Wrathful Storm

Starting at 14th level, your attacks from your Ongoing Storm are improved with your familiarity with the element of lightning. 

Chained Lightning: When you use your Lightning Strike feature, you can also hit any creatures that are with 5 feet within the 15 feet line that failed their DEX saving throw, dealing 1+ your strength modifier in lightning damage.

Thunder Crack: When you use your Thunder Clap feature, the range increases from a 10 feet radius to 20 feet, and they do an extra 5d4 of lightning damage.

Chained Lightning

When you perform your Lightning Strike, you first send forward a bolt of lightning paired with thunder, then move like a lightning bolt, striking all who fell from the thunder wave.

Thunder Crack

When you perform your Thunder Clap feature, a secondary wave erupts after the first, this bigger in size and strength. The range increases from a 10 feet radius to 20 feet, and they do an extra 5d4 of lightning damage.