Fury Instinct

Your rage comes from a deep and purely personal well within you. You use your rage as you choose.

Instinct Ability—Unstoppable Frenzy Increase the additional damage from Rage from 2 to 3. You gain a bonus 1st-level barbarian feat.

Specialization Ability (7th) Increase the additional damage from Rage from 3 to 7. If you have greater weapon specialization, instead increase the additional damage from Rage to 13.

Raging Resistance (9th) You resist physical weapon damage, but not physical damage from other sources (such as unarmed attacks).