Crimson Frenzy (3.5e Maneuver)

''MURDER! DEATH!! KILL!!!''

If you take 50 points of damage or more from a single attack you can initiate this maneuver. Doing so decreases the damage by 50 points, you become immune to death by massive damage for the duration, and you are driven into a murderous frenzy. In your frenzy you recieve half your initiator level to Str and Con, and your Con modifier to your Will saves (maximum +10 at 20th level). Your AC drops by -6 and you take 2 nonlethal damage each round. You are immune to pain and any pain effects, immunity to [Death] effects, and no amount of hp damage can kill you. Even if you are pushed far into negative hp you can still act and fight normally, though ability damage and non-hp effects may still kill you. Treat the frenzy as a barbarian rage.

The more dangerous aspect is that you lose sight of friend and foe. If all enemies are defeated and you are still in a frenzy you must turn on the nearest ally as if they were an opponent. Adjucant allies can attempt to shake you out of your madness with a standard action, granting you a Will save to resist this maneuver. The DC is 1/2 your HD + 15. Do not add your Con bonus from this maneuver to your save.

At the end of the duration, or if you successfully are shaken out of your madness, you are exhausted for 10 minutes. If you were under -10 hp when the maneuver ends you die normally.