Woot! 13k achievement points yay! I finished off Ghostlands (I had done 44/50 quests there some time ago but got lazy) and thank goodness for McTacky because I was stuck on 49 quests and couldn't find another one! He asked me if I had done the Sylvanas song quest, and I hadn't so he sent me off to Windrunner Spire and said that a quest item drops off mobs there. And he was right! I haven't finished the chain but I used it to get me my achievement.