Ultimate Rage Burst (3.5e Epic Power)

A power fueled by pure unbridled rage, this most potent of attacks combines the attributes of all seven Chaos Weapons. Once per round, you generate seven auras in a hemisphere around yourself. This aura does 10d20 damage of seven energy types (10d20 fire, 10d20 cold, 10d20 electricity, 10d20 acid, 10d20 sonic, 10d20 divine, 10d20 force) to all who make contact with it. You may launch the aura as a standard action at anything within 3000 feet as a ranged touch attack. When the aura sphere makes contact with any solid object, it explodes, dealing 20d20 damage of each of the listed energy types to everything within a 30-foot radius burst; a Reflex save is allowed for half damage, but the creature or object directly struck is not allowed a saving throw. Once the aura is launched, you regenerate a new one next round. This power can only be manifested when something happens that really, really pisses you off - like, say, witnessing your entire family being brutally slaughtered (or your spouse or any one of your family members, really... or perhaps one of the people you go on adventures with). Once activated, it does not end until the source of your anger has been utterly obliterated, and you are single-minded in your pursuit of your quarry. Alternatively, the power can be ended if somebody manages to talk you down from your rage, but chances are, only a very close friend will have any chance of achieving that. Finally, the power can be ended simply by killing you, knocking you unconscious, or otherwise rendering you incapable of fighting for an indefinite period of time, but you have damage reduction 60/-, 60 resistance to all forms of energy (including force), mettle, improved evasion, and a +30 morale bonus to all saving throws, grapple checks, and Intimidate checks while this power is active.

Basically, anyone who makes you angry is fuc*ed up the @$$, without lube, without cessation, for hours and hours. On the other hand, the only practical way to manifest this power at all is to have all seven of the Chaos Weapons in your possession, which allows you to manifest it once per week as a spell-like ability (read: you don't need to make a Psicraft check). And considering that they're major artifacts, good luck with that task.

Calm emotions can prevent this power from being manifested. It can also force ultimate rage burst to end, assuming that you somehow fail your Will save.