Final Axe

The Final Axe is a incredibly powerful, yet rare, two-handed weapon. It is suitable towards Warriors and Paladins, or any others with a high Attack Rating. It provides lethal bonuses, and can be given to a Power Core Dealer for 100 http://images1.wikia.nocookie.net/__cb20070321014528/wowwiki/images/1/10/Gold.png , or with 95 Runeforging to create a [Final Axe of Power] .
===Source===
The Final Axe drops from some of the more powerful monsters over Level 65. The chances of getting one are slim, around 2%. Elite creatures tend to carry these weapons around as well as a drop. It is also a reward choice for the Quest: Known Tools.
Another way is to kill someone in a staked duel or the Nether Realm who is carrying it.