This was present on some MoP and probably WoD as well, both private servers and possibly retail.
This basically gives the player a damage boost, it may benefit for some, to others, just a small amount of power and so forth.
The thing you do is simple....
Go to Crown Guard Tower - WoWWiki - Your guide to the World of Warcraft
and walk down the hill at it's base and "stand" there and bam, Overcome by Anger - Spell - World of Warcraft
This has been said to take effect in other zones (Pandaria perhaps), will now, you are informed of what it is, have fun.
This debuff can be forced on to ANY faction player, regardless of their level.
It provides:
Increases damage taken by 20%.
Increases damage dealt by 20%.
Death, unstuck or sudden gank-age seems to remove the deuff.
The effect is similar to the old zombie infection from wotlk launch, only different is you will not turn into a zombie.
Instead, you become black and white, like a ghost (To other players you appear this way).
Relogging or logging out seems to not remove the effect.
If possible, someone test this on retail if you want, I can't I haven't been on retail since MoP launch and I am far from buying time cards xD.
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