The future, take a look what will be comming....eventualy

A few changes are being made that are important to know about before looking at the Frenzied Berserker:

• The
  Vicious weapon enchantment now deals 2d6 damage to opponents struck by
  the weapon and 1d3 damage back to the wielder instead of 1d6.
  
• Barbarian Critical Rage I and II can no longer be trained.
  Characters that currently possess these enhancements will retain them
  until they reset their enhancements, and these enhancements count as
  their "Barbarian specialty".
  
• Barbarian Intimidating Rage has had its prerequisites changed to
  "either Barbarian Intimidate 4 or Barbarian Frenzied Berserker 2".
  

Now, on to the Prestige Enhancement iself:

Barbarian Frenzied Berserker I
Prereqs: Level 6 Barbarian, Power Attack, Cleave, Barbarian Damage Boost II, Barbarian Power Attack I, Barbarian Power Rage I.
Cost: 4 AP
Benefit: You gain the effects of the diehard feat while raging,
and your glancing blows have a chance of applying magical weapon
effects. You also gain the ability to expend 10 hit points to enter a
frenzy, which increases your strength by 2 and adds the 'Vicious'
property to your melee weapons.

An interesting Berserker that came up in playtest was a
Ranger/Barbarian archer that used the Frenzy abilities with a bow,
gaining the benefits of the increased strength, ignoring the Vicious
aspect that only affects melee weapons.

Barbarian Frenzied Berserker II
Prereqs: Level 12 Barbarian, Barbarian Frenzied Berserker 1,
Barbarian Damage Boost III, Barbarian Power Attack II, Barbarian Power
Rage II.
Cost: 2 AP
Benefit: While raging, increases the critical multiplier of all
weapons you use by 1 when you roll a natural 19 or 20. Your two handed
weapon glancing blows have an increased chance of applying magical
weapon effects. You also gain the ability to expend 10 hp to Supreme
Cleave.

Supreme Cleave:
Benefit: Expend 10 hit points to attack all nearby enemies.

Supreme Cleave has no cooldown other than a standard 1 second global
cooldown for attack actions. As long as you've got the hit points, you
can continue to bring the pain.

Barbarian Frenzied Berserker III
Prereqs: Level 18 Barbarian, Barbarian Frenzied Berserker 2,
Barbarian Damage Boost IV, Barbarian Power Attack III, Barbarian Power
Rage III.
Cost: 2 AP
Benefit: While raging, increases the critical multiplier of all
weapons you use by an additional 1 when you roll a natural 19 or 20,
bringing the total bonus to 2. Your two handed weapon glancing blows
have an increased chance of applying magical weapon effects. You also
gain the ability to expend 20 hit points to enter a death frenzy (which
can stack with your basic rage and frenzy), increasing your strength by
4 and adding the 'Greater Vicious' property to your melee weapons.
(+4d6 damage / +1d3 damage to self)

The Frenzied Berserker focuses on dealing tremendous amounts of damage
to its enemies, punctuated with absolutely devastating criticals.
Whether dual wielding heavy picks with a x6 critical multiplier, or
using a two handed weapon that's producing magical weapon effects on
glancing blows backed by their incredible strength, they dish out the
damage (to their enemies, and if they choose, to themselves).

The Berserker can stack both of their Frenzy abilities to increase
their strength by 6 and add an additional 6d6 damage to each of their
swings at the cost of 2d3 damage reflected back upon them, or become a
whirlwind of destruction using Supreme Cleave at will, as long as a
friendly healer is willing to keep them going.

Fighter Kensai I
Cost: 4 AP
Prereqs: Level 6 Fighter, Fighter Attack Boost II, Fighter Critical Accuracy II, any Weapon Specialization feat.
Benefit: You are the unrivaled master of your chosen weapon.
Your focus and training grant you a +1 bonus to Bluff, Concentration,
Diplomacy, and Intimidate skills, Combat Feat DC's, saves against
magic, and number of Action Boosts per day. If you possess a Ki bar,
you gain 1 additional Ki on criticals and when meditating. You can
select a single weapon type as your signature weapon.

Kensai Mastery I
Cost: 1 AP
Prereqs: Level 6 Fighter, Fighter Kensai I, Weapon Specialization:
Benefit (One handed, ranged, or thrown weapons): You gain an
additional +1 bonus to hit and damage, and +2 to confirm criticals and
critical damage (before multipliers) when using a.
Benefit (Two handed weapons): You gain an additional +1 bonus to
hit, +2 to damage and to confirm criticals and +4 to critical damage
(before multipliers), as well as improved glancing blows that have a
chance of applying magical weapon effects when using a .

---

The kensai masters body, mind, weapon, and will. The "ki projection"
ability of the prestige class has been changed into a passive ability,
and we've given the kensai a number of passive combat bonuses to
reflect their mastery of their chosen weapon. The base prestige class
requires a specific weapon, but we've expanded that as well to all longswords instead of just "the one given to me by my lord".

We also chose to give it some synergy with the monk class. The base
prestige class possesses a strong Eastern warrior-monk philosophy to
it, so it seemed natural to make this a potentially desirable
multiclass option.

---

Fighter Kensai II
Cost: 2 AP
Prereqs: Level 12 Fighter, Fighter Kensai I, Fighter Attack
Boost III, Fighter Critical Accuracy III, any Greater Weapon
Specialization feat.
Benefit: Your focus and training improve, granting an additional
+1 bonus to Bluff, Concentration, Diplomacy, and Intimidate skills,
Combat Feat DC's, saves against magic, and number of Action Boosts per
day. If you possess a Ki bar, you gain 1 additional Ki on criticals and
when meditating.

Kensai Power Surge
Benefit: You may expend a Fighter attack boost to focus your
energy and spirit, gaining a +8 Insight bonus to strength for a short
period of time. If you possess the ability to generate Ki, you generate
an additional 2 ki on successful attacks during your surge.

Kensai Mastery II
Cost: 1 AP
Prereqs: Level 12 Fighter, Fighter Kensai II, Fighter Specialization I, Kensai Mastery I, Greater Weapon Specialization:
Benefit (One handed, ranged, or thrown weapons): You gain an
additional +1 bonus to hit and damage, and +2 to confirm criticals and
critical damage (before multipliers) when using a .
Benefit (Two handed weapons): You gain an additional +1 bonus to
hit, +2 to damage and to confirm criticals and +4 to critical damage
(before multipliers), as well as improved glancing blows that have an
increased chance of applying magical weapon effects when using a .

---

Power surge is one of the defining abilities of the kensai.

---
Fighter Kensai III
Cost: 2 AP
Prereqs: Level 18 Fighter, Fighter Kensai II, Fighter Attack Boost IV, Fighter Critical Accuracy IV, any Superior Weapon Focus.
Benefit: Your focus and training are complete, granting an
additional +1 bonus to Bluff, Concentration, Diplomacy, and Intimidate
skills, Combat Feat DC's, saves against magic, and number of Action
Boosts per day. If you possess a Ki bar, you gain 1 additional Ki on
criticals and when meditating.

Kensai Mastery III
Cost: 1 AP
Prereqs: Level 18 Fighter, Fighter Kensai III, Fighter Specialization II, Kensai Mastery II, Superior Weapon Focus:
Benefit: You gain +1 critical threat range with your signature weapon.

---

Critical threat range increases will be rarer in the future, but we
thought it appropriate that the undisputed master of a specific weapon
would have access to such a powerful ability. Precision is the mark of
a true swordmaster.

Warforged Great Weapon Aptitude I
Prereqs: Level 2 Warforged, Two Handed Fighting
Cost: 1 AP
Benefit: Glancing blows produced by your two handed weapon attacks have an increased chance of producing special weapon effects.

Warforged Great Weapon Aptitude II
Prereqs: Level 8 Warforged, Improved Two Handed Fighting, Warforged Great Weapon Aptitude I
Cost: 2 AP
Benefit: Glancing blows produced by your two handed weapon attacks have an increased chance of producing special weapon effects.

Warforged Great Weapon Aptitude III
Prereqs: Level 14 Warforged, Greater Two Handed Fighting, Warforged Great Weapon Aptitude II
Cost: 3 AP
Benefit: Glancing blows produced by your two handed weapon attacks have an increased chance of producing special weapon effects.

All of these stack with the "chance to produce effects" increases
granted by the Two Handed Fighting chain, Kensai (specialized in two
handed weapons), and Frenzied Berserker.

Serenity
Prereq: Level 20 Monk, 74 Action points spent
Cost: 2 Action Points
Benefit: You are a paragon of understanding and serenity. Your
Concentration is increased by 10 and your centered ki generation is
increased by 1.

Serenity is subtle, yet in the hands of a master, potentially very
powerful. Ki retention is heavily governed by one's Concentration
score, and while this is a hefty bonus; the second bonus is what I find
much more interesting... With Serenity, a monk's ki not only decays at
a slower rate and stabilizes at a higher "Concentration band", but it
will actually regenerate over time if their accumulated ki is low.

Master of Magic
Prereqs: Level 20 Wizard
Cost: 2 AP
Benefit: Grants +2 Intelligence and all metamagics you possess cost 1 fewer spell point to use. (Heighten Spell costs 1 fewer spell point per level of heightening.)



Divine Intervention
Prereq: Level 20 Cleric, 74 Action points spent
Cost: 2 AP
Benefit: You are a strong conduit of positive energy, and can
expend a turn attempt to ward your target for five minutes against
mortal damage - hit point damage will not lower their hit point total
below -9. If the target is knocked unconscious, this effect will heal
the target after a few seconds and then fade.

Players that have gone through the Korthos Island experience may
remember Cellimas' Protection from Death effect - this is an altered
version of that tutorial spell. Essentially, while this effect is on
your target, they cannot die from hit point damage. Instant death
effects like Implosion or Finger of Death bypass this protection,
however, so keep those Deathblock items on, and it fades a few seconds
after being forced to activate. Still, that's one less dead person!

Cheat Death
Prereq: Level 20 Rogue
Cost: 2 AP
Benefit: A master rogue can defy even death if their luck holds
out. You have a chance of self-resurrection should you die, but this
chance drops each time you die between rests. Maruts have a particular
dislike for you.