Barbarians
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* Instead of gaining bonuses to Strength and Constitution while raging, the barbarian now gains an untyped +2 bonus on melee attack rolls, melee damage rolls, thrown weapon damage rolls, and Will saving throws. (Untyped means these bonuses stack with any other bonuses the barbarian might have) The barbarian is also fatigued for 1 minute when he ends his rage, as opposed to 2 times the number of rounds spent in the rage. At 5th level, the bonuses granted by rage increase to +3. At 11th level, they increase to +4. At 20th level, they increase to +6.
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* The extra hitpoints gained during a barbarian's rage are now treated as temporary hitpoints. These hit points are in addition to the character’s current hit point total and any damage taken by the character is subtracted from these hit points first. Any damage in excess of a character’s temporary hit points is applied to his current hit points as normal. If the effect that grants the temporary hit points ends or is dispelled, any remaining temporary hit points go away. The damage they sustained is not transferred to the character’s current hit points.
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* Barbarians no longer incur a penalty to AC while raging. Instead, the barbarian gains an armor bonus equal to his current Constitution modifier. This includes the bonus granted by rage. This bonus only applies when the barbarian is wearing no armor. The barbarian's body counts as a suit of armor for the purposes of spells such as Magic Vestment; however, the effect only applies when the barbarian is wearing no armor and is raging.
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* Fast Movement (Ex): while wearing heavy armor, this ability still does not apply, but it does prevent the barbarian's speed from being reduced by armor or encumbrance, similar to the dwarf ability Slow and Steady. If the barbarian is a dwarf, then Fast Movement's speed increase does apply while wearing heavy armor. The barbarian must have heavy armor proficiency to benefit from this effect.
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* Some of the barbarian's rage powers have been altered as per the documentation on the Unchained Barbarian D20PFSRD page. See this page for further details.
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* Enduring Rage (Ex): this rage power allows the effects of the barbarian's rage to continue for two rounds after the barbarian stops raging, if he so wishes. During these extra two rounds, the barbarian's rage functions as normal, but his reserve of rage rounds does not deplete further. After the extra two rounds, the barbarian's rage must end.
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* Savage Core (Ex): starting at 3rd level, a barbarian gains a +1 increase to their existing natural armor bonus. Every three barbarian levels thereafter, the barbarian gains an additional +1 increase, to a maximum of +6 at 18th level.
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* Tireless Rage (Ex): this ability is now gained at 9th level, instead of 17th level.
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* Primal Endurance (Ex): starting at 17th level, a barbarian is completely immune to fatigue.
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* Eternal Rage (Ex): starting at 19th level, a barbarian can rage at will.
