Quest: "A Spirit Guide" Hellfire Peninsula
The summoned spirit wolf does not track the NPC and will not progress through the quest objectives.
This poses a problem with acquiring the necessary reputation with The Mag'har to continue into Nagrand.
The trick is to go to Nagrand and kill a few oggres there, get rep with mag'har and come back-if you want to do all the quests for achievements-. If not, just skip and go marsh and when in nagrand just kill some oggres. Btw, you have to lead the wolf up to the base, that part works only like this.