Skill Name:
Bloodlust/Berserk/Rage (you pick which name)

Description:
Unsatiable lust for blood and death. Bathe in the blood of your enemies.

Classes:
Arch Templar Only or Arch Temp/ Warrior Only

Cost/Duration/Targets:
1 Hitpoints per MOD (250 mod = 250 damage to yourself)
Self Casting Only (same as harden)
Duration would be same as harden (so stays on until u turn it off)

Effects:
-Increased WV (you pick how much).
-Increased crit chance (you pick how much) or a special critical
-Negative HP regeneration
-Life on kill or on critical (you pick)

Examples:

Example 1 - max regenerate, medium skill
120 mod regenerate
60 mod Bloodlust/Berserk/Rage
You would cast Berserk and your life would slowly increase

Example 2 - max regenerate, high skill
120 mod regenerate
90 mod Bloodlust/Berserk/Rage
Life would mostly be stable, not going up and down without being hit by something or getting kill/crit

Example 3 - max regenerate, max skill
120 mod regenerate
120 mod Bloodlust/Berserk/Rage
Your life would slowly go down and you would need to either be killing mobs at a fast pace to counter Health loss or you would need to heal yourself.

Example 4 - low regenerate, max skill
30 mod regenerate
120 mod Bloodlust/Berserk/Rage
Life would go down to quick to be usable other than quick use (on some boss or something) unless someone healing you.

Notes:
- Instead of life degeneration, you could make the character loose life every attack he performs, then gain life back on kill. This means that you would lose alot of life if you use it on a boss or harder mobs, but if you use it on easier mobs, you might gain life from it.
- I am not sure how much life / sec regenerate gives. So this skill would need alot of testing to see how it feels.
- Ideally limit this to Arch Templar/Warrior. They need skills to make them different from classes like necro or seyan. Would allow for better balancing between classes as well.