Edit: The windmaster thing no longer works..:yuck:
First of all you need to do the Flawless Flame quest chain (Thottbot World of Warcraft: Quest: The Flawless Flame) From this quest chain you receive Thottbot World of Warcraft: Torch of Retribution or The Torch of Retribution.
The thing is this weapon does no damage at all, whatsoever, none, zilch, zip, nadda.
This has a variety of uses but I'm only covering two here.
You can use this weapon to raise your unarmed skill. Since it does no damage you can attack a low level mob, even a rat or a level 1 skeleton without it dying. If you are higher level you should regen fast enough for their damage to be inconsequential, and you can AFK level your unarmed skill from 1-375.