I've found these mobs in Northrend which are totally immune to all form of damage. You can level your weapon skills off of them and not get hurt at all. You also never have to switch mobs since they don't die. The location for these mobs are highlighted in the map below (kindly click map to enlarge) :
The mobs are just on the ledges right above the area. They are named Iceskin Sentry, they have a buff which "freezes" them in stone. Enjoy getting your free achievement and weapon skills! Happy Weapon Skill Leveling!Labels: leveling guide, weapons, wotlk
