While attuned to these bracers, You cast the spell Armor of Agathys at 3rd level as a part of entering your Rage. 

While attuned to these bracers, you can create a bond with one non-magical melee weapon over an hour, only one weapon can be bonded to the bracers at a time. The bonded weapon gains a +1 to attack and damage rolls and is considered magical for the purposes of overcoming resistances. When you hit with an attack using the bonded weapon, the target takes an extra 2d6 cold damage. In addition, while you hold the bonded weapon, you have resistance to fire damage. In freezing temperatures, the weapon sheds bright light in a 10-foot radius and dim light for an additional 10 feet.

You can summon the bonded weapon to your free hand as a free action

When you draw this weapon you can extinguish all nonmagical flames within 30 feet of you. This property can be used no more than once per hour.

Notes: By a Barbarian