So I made it to the last guy (Hand of Naxx) and the guide says use my Argent Dawn Comission (which I have equipped - it's a trinket) to burn it to a crisp, but when I clicked on the Comission, nothing happened. What the heck? I was just standing there staring at this guy as he disappeared. =/ Do I have to pull it into my bags and then click it again? When I do that I light up but I already have the buff on me so I don't get it. Help please! D:
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For everyone that asked, this IS account wide. Once you receive the achievement, all of your Alts will have access after completing the questline on one of your Characters.