Barbarian

The Barbarian is a Core class of DnD 5e. It is used to show the abilities of the wide range of characters who wield their strength and their rage over magic, subtlety, or skill in general. Barbarians are universally mighty warriors with a penchant for never falling in combat.

While many barbarians find their home on the battlefield, many barbarians find their home in the wilds with the spirits, the taverns and their revelry, or even in the quiet of temple or libraries. It is always worth remembering that Rage is not the exclusivity of a barbarian's mind. It is equally worth remembering that a Barbarian's spark of rage is forever at the surface, ready to show itself, even in their moments of loving silence or joyous celebration, never far from their mind.

Barbarian Mechanics
Most of all barbarian stats can be found on 5etools. Homebrew Subclasses:

Heroic Barbarians
Heroic Barbarians gain access to a special Rage, often connected to an animal or symbol important to the barbarian. Some of these rages include;

Howling Wolf Rage: While raging, you regain hit points equal to your Rage Damage plus your Charisma modifier each turn.

Mindshatter Rage: While raging, your damage is considered Psychic in addition to it's normal types, using the most damaging type.

Screaming Thunderbird Rage: When you rage, and as a bonus action while Raging, you erupt into a burst of lightning and thunder, dealing damage equal to your level to all creatures within 10 feet.

Warrior Bear Rage: While raging, you may use your Reaction to make a melee weapon attack against any creature who makes an attack against a creature other than you.

Barbarian Variants
Brute- A more tempered, less savage barbarian which leads armies.

Vandal- A quick and dexterous barbarian which often acts in raiding parties.

Barbarians and Rage
Barbarians as a whole possess a unique relationship with anger, but barbarians nurture a very specific ability which goes beyond mere anger. Scholars call this the Spark of Rage, a sort of supernatural connection to Wrath as a concept. It is not mere anger, but a special trance of war, and each barbarian bears a different relationship to their Spark. Some use their Spark as a medium to communicate with gods and monsters, spirits, or stranger things yet. Others, notably on Amedala, use their Spark to connect to the Astral Sea directly, wielding psionic abilities which would be untamed and untouched otherwise. Some see their Spark as a curse which cannot be removed. This relationship shapes much of the barbarian's life, not merely the manner in which they hit things.

Barbarians on Acheri
Barbarians make up a large portion of the elemental cults and tribes of Acheri, and the rare Zealot acts within the angel's legions. Barbarians are usually treated with a great deal of respect in either case, for both their prowess in battle and the spiritual side of their existence connecting them to the gods and monsters in a direct manner, even when compared to other classes fulfilling the same rolls.

Barbarians on Aldrow
Many Dragons, especially those of a Chromatic origin, possess a Spark of Rage. Of course many of their descendants possess this spark as well. Barbarians are, along with most other exclusively-martial classes, treated with less respect than their magical counterparts, but there is no contempt against them. Indeed, many, particularly those in the Venomfang Tribe, consider the Spark of Rage a form of magical energy which should be respected, even though it is harder to harness than spellcasting. In the Venomfang tribe specifically, Barbarians are seen as useful guides in connecting with the draconic spirits older than even the eldest of the tribe.

Barbarians on Amedala
On Amedala, the Spark of Rage is attributed to an anomaly in one's mind which grants them Psychometabolic potential, but no way to properly control this potential. This causes many, particularly those with powerful psionic abilities, to see barbarians as a tragic tale. This can occasionally come off as demeaning, though few people consider it a true travesty, and even fewer act like it is.

Barbarians on Anntarrem
Barbarians on Anntarrem are generally seen as meat shields, in the highest regard. Because their power is not tied to the Magitech inventions so popular on Anntarrem, barbarians are seen as not only useful, but in many cases vital to the ongoing progress of the societies on Anntarrem. Because the energy-based weapons are less conducive to harnessing their massive strength, Barbarians on Anntarrem typically wield large, simple, but effective melee weapons, usually made from enchanted metals.

Barbarians on Anukavin
Anukavin is a sort of haven for barbarians, being that it is filled with Giantspawn tribes and hordes, and those are filled with barbarians. Though it varies from tribe to tribe, barbarians are often seen as both physical and spiritual leaders, incredible warriors and a connection to the tribe's Giant ancestors. They are revered.

Barbarians on Araminta
Barbarians are uncommon in polite Aramin Society, but common in some of the northern tribes. In typical Aramin society, barbarians are almost exclusively bodyguards, and are often seen as beasts more than people(It doesn't help that most Barbarians come from the tribes). The tribes have much more variation, though barbarians are usually seen as a sort of counterpart to a Monk, where monks are more disciplined and spiritual, with barbarians being more physical and wild. Two sides of the same coin.

Barbarians on Arclent
Arclent is a continent which loves their armies, though just as much do they love their mercenaries and specialist groups. Barbarians are usually seen as disruptive in the normal military operations on the continent, though they are not discouraged from becoming military, just handled more directly. Some of the Goliath and Human tribes are comprised of barbarians, though few remain on the surface of Arclent after the demonic invasion 70 years ago.

Barbarians on Azzeranni
The lycanthropes and Beastkin of Azzeranni all possess that Spark of Rage, and many learn to cultivate it under the guidance of the spirits. Moreso than the rest of Nexus, Azzeranni holds barbarians in an explicit and expected spiritual role, a go-between for the spirits and the lycanthropic beings, who themselves act as a sort of go-between for the spirits and the world as a whole.

Barbarians in Alloy
Alloy, the city of living thought and unending belief, has little place for barbarians as a whole. They find their way to and in the city on occasion, many finding their roles in niche security or paramilitary operation where magic simply doesn't work, such as working for a Beholder. In general, they are rare in the city of Alloy.