Path of the Vengeful Guardian

Path of the Vengeful Guardian Barbarians tend to care a lot about others.  They will do anything in their power to protect those around them, and if they fail to do so they wont stop until the ones responsible pay.

Selfless Sacrifice

If an attack roll is made against a creature within 5 feet of you you can make a dexterity check + proficiency modifier.  If you beat the attack roll you take the damage instead of the original creature.  This is not a saving throw so it is not affected by danger sense.  Resistances still apply.

Protective/Unbridled Rage

If you expend two rage slots you can go into either an unbridled or protective rage.

Unbridled Rage: When you expend two rage slots and choose unbridled rage you double your strength modifier in both your attack to hit and your damage.  However you no longer get the resistances granted by rage.  

Protective Rage: When you expend two rage slots and choose protective rage your resistances granted by rage are doubled meaning you take 1/4 damage.  You also have advantage on selfless sacrifice rolls.  However you no longer add your strength modifier to attack or damage rolls.

True Martyr

If a single attack does 1/5 of your total health, you drop to 0 hit points, or drop below half health your allies that have line of sight on you gain advantage on all attacks against the creature that triggered this affect.  This lasts for 12 seconds.  If the damage that triggered the attack is dealt due to a selfless sacrifice the duration doubles and the next attack against this creature is considered a critical hit.  If the triggering damage is dealt by yourself or an outside force other than a creature the affect does not get triggered.

Perfect Defense

When rolling for a selfless sacrifice if you roll a natural 20 you negate all damage that would be dealt to either target regardless of damage type.