Path of Blood and Bone

The Path of Blood and Bone is the eldritch horror of Barbarians. They enter a terrifying state of bloody anger each time they rage, their bones piercing through their skin and their blood sizzling. Their eyes often glow red and their skin tightens. This dark magic looks like a curse to many, but is seen as power to some. The magic used by these Barbarians is often obtained by drinking the blood of a god or worthy Paladin, giving them supernatural abilities while in their angry state.

Bone-Armor Rage

Starting at 3rd level, your skin begins to grow a bone-like coating while raging. While raging and wearing no or light armor, you may add your proficiency bonus to your AC for a maximum of 25. While using this feature, your AC cannot be raised by any magical means.

Nectar of The Gods

Starting at 6th level, your blood reaches extraordinary temperatures. While raging, your blood begins to audibly boil within your body. You gain disadvantage on Dexterity(Stealth) checks while you are raging against enemies that can hear you. If you have taken damage before or during your rage, acidic blood begins to flow out of your body. You may create this blood flow by harming yourself in any way, as long as you take damage that draws blood from your body. Your blood deal 1d6 acid damage to any foe that touches it, scaling with your level.

At Higher Levels  The acid damage that your blood deals increases at 10th level to 1d8, at 14th level to 1d10, and at 18th level to 1d12.

Pierced Flesh

At 10th level, you gain a supernatural control over your own bones. As an action on your turn, you can make 6 large, sharp bones pierce out of your body. These bones can appear anywhere you wish, and you take 1d4 piercing damage when they appear(this is halved while raging). Any enemy that touches these spines immediately takes 1d8+Your Strength Modifier of piercing damage, and must succeed a Strength saving throw of 10+Your Strength Modifier or become stuck to you body, becoming prone and grappled at the same time. It addition, you may take a bonus action while raging to coat these bones in your acidic blood, dealing the corresponding additional acid damage to the target. If you are already raging while these spines come out, the acid is already applied.

Body of Eldritch Horror

At 14th level, you become an unstoppable tank. While raging, you have advantage on all constitution-related checks, and gain resistance to acid damage.