3rd level Path of the Giant Slayer feature
At 3rd level you gain proficiency in Leatherworker’s Tools if you don’t have it.
Beginning at 3rd level, you may attempt to craft a superior set of Medium Armor (Hide) from a creature that you have slain in 1 on 1 combat. Because the Barbarian obtains power from his confidence, bravery, and trophies of his previous successes; the duel must be legitimate. Allies may not help the Barbarian in any way during the contest, including enhancement spells casted prior to the fight; though magic items and armor given to the barbarian before the battle are allowed. Allies may circumvent this by hiding their support, but if the Barbarian later realizes the battle was staged or rigged in any way, the value of the trophy loses meaning and the loss of confidence will remove any benefits the Barbarian would gain from this feature.
For this feature, the creature to be fought by the Barbarian must be of substantial danger to the Barbarian for it to be a legitimate challenge. A suitable creature for this feature is any monster whose challenge rating is equal to half the level of the Barbarian, rounded up; though the Dungeon Master has ultimate say in this regard. The creature must also be able to produce heavy hide that could reasonably be crafted into Hide armor, a few examples are beasts, dragons, giants, certain kinds of demons, etc. The Dungeon Master has final say in what can be turned into heavy hide.
Provided the duel is successful, the Barbarian may craft from the corpse of the creature a Medium Armor (Hide) using his own Leatherworker’s Tools. While the Barbarian wears this special set of Hide armor, the maximum Dexterity modifier to AC for the armor increases to 5, instead of 2. Further, the Barbarian may also add his Constitution modifier to his armor class.