Primal Path
Comments from the Finger: A clever little barbarian crafted by our friend Grand Moff and refined by yours truly. I’m pretty happy with how it came out.
Path of Tranquility
Barbarians of the Path of Tranquility follow a strange philosophy for their kind. Unlike their furious berserker brethren, the Serene, as they are often called, practice restraint and moderation in their rage. They are calm, tactical fighters, striking swiftly and without warning.
Mantra
Starting when you select this path at 3rd level, taking the Dodge action on your turn counts as attacking a hostile creature for the purposes of sustaining your rage.
Anticipate
Also at 3rd level, whenever you do not make an attack roll on your turn, you prepare yourself for blows. Until the start of your next turn, whenever a creature makes a melee attack against you, you can use your reaction to make one melee weapon attack against that creature.
Battle Trance
At 6th level, whenever you use your reaction to make an attack, you can make two attacks instead.
Tranquility
At 10th level, you can chant calming verses to entice, relieve, and protect those around you. You can cast the calm emotions, enthrall, and sanctuary spells once each, without expending spell slots or components, and regain the ability to do so when you finish a long rest. You can cast these spells while you are raging. Your spell save DC for these spells is 8 + your proficiency bonus + your Constitution modifier.
Zen State
At 14th level, whenever a creature misses you with a melee attack, you gain a +2 bonus to your Armor Class, up to a maximum of +6. This bonus resets to 0 if you take damage or at the start of your turn.