Path of the Frozen Heart Barbarian

All barbarians feed upon their rage for their power, most struggle to control that fiery hot anger which consumes everything, some however feel nothing nothing as their anger deadens all around them. These few, known as Frozen Heart Barbarians, use their rage to deaden everything but their need to harm their opponent. A cold hands grasps their heart and their emotions are sharpened to be the deadliest blade with which they use explosive violence to enact their version of justice.

Level 3: Cold Shield

When you rage you automatically cast Armor of Agathys at the highest level you can cast it. You can choose what elemental damage the Armor does. You can choose for your weapon attacks to also do that damage. As a bonus action on each of your turns you can reapply the armor. You can only do so if all Temp HP from the previous armor is gone.

At the same time you no longer gain the additional damage to melee attacks from raging, resistances, and advantage to strength rolls.

When you rage, you make a weapon you proficient in appear in your hands which is made out of and deals the damage of your chosen armor of Agathys damage type. This weapon lasts for the duration of your rage. It deals the same amount of damage as a normal weapon of its type. 

Level 6: Feel Nothing

At level 6 you gain resistance to the damage type you choose for your armor and weapon. You also deal an additional D6 damage of that type on your attacks. At level 10 it becomes a D8 and a D10 at 14 and a D12 at level 18.

Level 10: Snap Shield

As a reaction you can cast the shield spell. The target takes the armor of agathys damage even if they don’t do damage to you. You can use ability a number of times equal to your Con mod.

Level 14: Overwhelming Calm

Level 14 Once per long rest when you rage you gain all elemental resistance. You can choose which damage the target takes each time they attack. You can choose which elemental damage you do on each attack. When you reapply the armor you can add your Con mod to the temp hp.

Level 14 in a 30 ft emanation from you. A number of allies equal to your con mod also gain armor of agathys. When you reapply it as a bonus action they also gain it. They do not gain any additional benefits besides the base affect of armor of agathys. Giving armor to your Allie’s follows the rules of your own, they must have no temporary hp remaining to gain the armor again.

As a reaction you may cast the shield spell, using one of your charges up to your CON modifier, to shield an ally with your armor of agathys who is also within 30ft of you. The enemy takes damage even if they deal none.