Primal Guardian

Unstoppable
At 1st level, your rage transforms you into an unstoppable force of nature. While you are raging, you have resistance against all damage except psychic damage.

Warning Shout
At 3rd level, you become more aware to the dangers that threaten your allies. When a creature that you can see within 30 feet of you takes damage, you can use your reaction to reduce the damage that the creature takes by 1d6 + your Constitution modifier (a minimum of 0). The creature must be able to hear you to gain the benefits of this feature. The damage reduction granted by this feature increases to 2d6 at 6th level, 3d6 at 9th level, 4d6 at 13th level, and 5d6 at 18th level.

Danger Presence
At 6th level, your enemies find you difficult to ignore and distracting if close. Any creature within 5 feet of you that's hostile to you is provoked. Additionally, you can use 2 actions to challenge all hostile creatures within 30 feet of you, goading them into attacking you. A creature that can hear you must make a Wisdom saving throw against a DC equal to 8 + your proficiency bonus + your Constitution modifier. On a failed save, a creature is provoked by you until the start of your next turn. You can use this ability a number of times equal to your proficiency bonus, and you regain any expended uses when you finish a short or long rest.

Vengeance
At 9th level, when you use your Warning Shout feature to reduce the damage that a creature takes and the damage is not reduced to 0, you can swear vengeance upon the creature that dealt the damage. During your next turn, your first successful Attack against that creature deals additional damage. You roll your Brutal Critical dice and add the total to your damage roll. This additional damage is not increased if you score a critical hit with the Attack.

Greater Warning Shout
At 13th level, you can use your Warning Shout feature on a creature that has to make a saving throw against an effect or spell. The creature makes it's saving throw with advantage. If the creature fails the saving throw, you gain the benefits of your Vengeance feature.

Greater Vengeance
At 18th level, when you swear vengeance upon a creature all of your Attacks against it are made with advantage until you hit it with an Attack.