An Alliance mage uses an overpowered trick to attack the main Horde city in the first few days of the Mists of Pandaria expansion.

The exploit was done by stacking the buffs granted from the quest [The Might of Three] and using it outside of their intended range. It was hotfixed within an hour after recording this video.

Only the defensive parts of the buffs worked against players. The buffs to damage only worked against NPC targets. I did not have any immunity to crowd control effects, so I was locked down most of the time.