Path of the Giant Soul

Barbarians who draw their power from Giants commit incredible feats of strength, athleticism, and power. No matter which kind of giant the barbarian may descend from, they are considerable foes to be matched against. 

Giant Ancestry

Starting at 3rd level, you take on the aspect of your Giant ancestor.  You gain proficiency with smith's tools, and learn to speak, read, and write Giant. Whenever you use a bonus action to rage, your size category increases to the next category, from small to medium, medium to large, or large to huge. You are able to push carry, lift, or drag weight proportionate to this size category. 

You also gain specific features based on the nature of your Giant heritage, which gains extra features at later levels. Choose between Cloud, Fire, Frost, or Stone Giants.

Cloud Soul

You take on the aspect of a Cloud Giant, as mist forms around you, wind blows your hair, and your eyes glow a bright blue. For the duration of your rage, you gain a flying speed of 30 feet, and can add your Charisma modifier to any damage rolls you make (minimum of 1).

Fire Soul

You take on the aspect of a Fire giant, as your hair begins to glow and singe, your eyes glow bright scarlet, and heat radiates from you. You become resistant to fire damage for the duration of your rage, and can deal an extra 1d8 fire damage on a hit once per turn. This damage increases to 2d8 at 10th level, and 3d8 at 17th level.

Frost Soul

You take on the aspect of a Frost Giant, as your hair begins to frost over, you exude a blast of cold energy from within you, and your eyes glow a brilliant white. For the duration of your rage, you gain resistance to cold damage, and radiate an aura of cold in a 10 foot radius around you. Whenever a hostile creature enters the area for the first time on a turn or starts its turn there, they must make a Constitution saving throw or suffer 1d6 cold damage. The DC is equal to 8 + your proficiency bonus + your Constitution modifier. This damage increased to 2d6 at 10th level, and 3d6 at 17th level.

Stone Soul

Taking on the aspect of a Stone Giant, your limbs extend and your flesh hardens. For the duration of your rage, due to your Stone-like nature, attacks you deal to structures cause double damage. In addition, as a reaction, you can reduce the damage dealt by a ranged attack by an amount equal to 1d12 + your level. If this would reduce the damage to 0, you take no damage.

Aspect of the Giant

At 6th level, the Giant ancestry in your blood gives you additional strengths and benefits. These are based off of the ancestry you picked at level 3. 

Aspect of Fire

Learning the hidden knowledge of your Fire Giant ancestors, you become a master of weapon and armor smithing. You gain double proficiency in Smith's Tools when crafting or repairing weapons and armor. You also can use War Chant. Once per long rest, you can spend a minute to chant an ancient song of battle. For the next hour, you and 6 creatures of your choice within 60 feet gain temporary hit points equal to your Constitution modifier, have advantage of saving throws against being charmed, and gain use of a d4 inspiration die that lasts for the duration, instead of the regular 10 minutes.

Aspect of Frost

You begin to harbor the hearty nature of your Frost Giant ancestors, becoming stronger and more resilient. Your speed increases by 10 feet, and your Constitution score increases by 1, as does your maximum for that score.

Aspect of Stone

Harnessing the graceful athletics of your Stone Giant ancestors, you become a more dextrous and lithe fighter. You gain proficiency in Dexterity saving throws, and you become proficient in Acrobatics. If you are already proficient, you become doubly proficient.

Aspect of the Cloud

Honing into your Cloud Giant ancestry, you harness their charismatic nature while performing athletic tasks. You can add your Charisma modifier to any strength based check you make (minimum 0) a number of times equal to your Proficiency bonus per long rest. In addition, while raging, you take no damage from falling, as if under the effect of a Feather Fall spell.

Prospect of Giants

At 10th level, your Giant ancestors have changed you into a force to be reckoned with. Your body begins to change into a form more resembling your ancestor. While raging, you can use a bonus action to change your current size to Huge, regardless of your current size category. You gain 40 temporary hit points. Your weight increases proportionately to the size category.  You can also push, carry, lift, and drag objects up to the size category that a Gargantuan creature can. You can use this feature a number of times equal to your Strength modifier per long rest.

Colossal Avatar

At 14th level, the Giant blood in your veins forever attunes you to them. You are granted powerful abilities based on your ancestry chosen at 3rd level. 

Avatar of Clouds

You take on the full aspect of a Cloud Giant. While raging, your flying speed increases to 80 feet. In addition, you can add your Charisma modifier to your AC (minimum of 1).

Avatar of Fire

Taking the true might of a fire giant, your body is a source of extreme heat. While raging, you become immune to fire damage. In addition, any fire damage you deal ignores resistance of creatures other than giants, and any creature other than a giant that is immune to fire is instead resistant.

Avatar of Frost

Becoming an avatar of the Frost Giants, you become a radiating beacon of frost. While raging, you become immune to cold damage, and the sphere of freezing cold surrounding you while raging increases to a 30 foot radius.

Avatar of Stone

You become the true avatar of the Stone Giants. Your flesh hardens to an extremely tough exterior, making you one with the stone your ancestor based itself on. Your AC becomes 20 if it isn't already, and you gain the Tough feat.