Inferno berserkers are barbarians whose bloodlines contain a trace of elemental power. When these barbarians rage, their elemental heritage manifests itself in fiery devastation to their enemies.
Burning Rage (Su)
An inferno berserker can call upon inner reserves of strength and ferocity, granting him the power of great elementals. Starting at 1st level, a barbarian can rage for a number of rounds per day equal to 4 + her Constitution modifier. At each level after 1st, she can rage for 2 additional rounds. Temporary increases to Constitution, such as those gained from rage and spells like bear's endurance, do not increase the total number of rounds that a barbarian can rage per day. A barbarian can enter rage as a free action. The total number of rounds of rage per day is renewed after resting for 8 hours, although these hours do not need to be consecutive.
When in the rage, the inferno berserker transforms as if affected by the elemental body, but may only choose the powers of a fire elemental. At 5th level he is affected by elemental body II, at 11th level by elemental body III/ and at 20th level elemental body IV.
A barbarian can end her rage as a free action and is fatigued after rage for a number of rounds equal to 2 times the number of rounds spent in the rage. A barbarian cannot enter a new rage while fatigued or exhausted but can otherwise enter rage multiple times during a single encounter or combat. If a barbarian falls unconscious, her rage immediately ends, placing her in peril of death.
This ability replaces rage, improved uncanny dodge, mighty rage and greater rage.
Fear’s Friend (Ex)
At 3rd level, a inferno berserker gains a +1 morale bonus to Intimidate checks. These bonuses increase by +1 every three inferno berserker levels thereafter (6th, 9th, 12th, 15th, and 18th level). The inferno berserker also receives a morale bonus to saves against fear effects equal to one-half the bonus to Intimidate checks.
This ability replaces trap sense.