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3rd Level — Pain Without Fear
You gain proficiency in the Intimidation skill. If you already have proficiency in it, you gain proficiency in another skill from the barbarian skill list.
Additionally, when you make a Charisma (Intimidation) check, you can use your Strength modifier in place of your Charisma modifier.
You also become immune to magical effects that would force you to recoil from pain, at the DM’s discretion. (IE Power Word Pain)
3rd Level — Martyr’s Protection
When a creature you can see within 30 feet of you is hit by an attack, you can use your reaction to intercept the blow.
The target gains resistance to the triggering attack’s damage, and you take damage equal to the amount prevented.
You must be able to see both the attacker and the target to use this feature.
6th Level — Vengeful Interception
When you take damage from your Martyr’s Protection feature, you can immediately make one melee weapon attack against the triggering creature if it is within your reach.
This attack uses your reaction as part of the same reaction used for Martyr’s Protection.
Additionally, you can use Reckless Attack when making opportunity attacks.
6th Level — Aura of Provocation
As an action while raging, you emit a hostile aura for 1 minute. The aura extends 15 feet from you and moves with you.
When you activate the aura, choose any number of creatures you can see to be unaffected by it.
A hostile creature that starts its turn within the aura has its speed halved until the start of its next turn.
In addition, the creature must succeed on a Wisdom saving throw (DC = 8 + your proficiency bonus + your Constitution modifier) or it cannot willingly target creatures other than you with attacks, spells, or abilities until the start of its next turn.
A creature immune to the charmed condition is immune to this targeting restriction, but not the reduced speed.
Once you use this feature, you can’t use it again until you finish a long rest.