Thunderfury, Blessed Blade of the Windseeker Item Wowhead
Warriors already pay a buttload of money towards repairs after raids. Especially tanks. Since the sword was awarded the right to be an offhand it has become a very much wanted item by Rogues. Even though the threat from the proc is insane, most rogues can handle it. I've seen a paladin with this sword too, he put +22 Int on it. I lol'd.