Loner and a Rebel

There are three sets of Shado-Pan daily quests:

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• Omnia Mystics: Shan'ze Dao (northern most island)
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• Wu Kao Assassins: Sra'vess (western most island)
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• Blackguard Defenders: Deadtalker's Plateau and Fire Camp Gai-Cho (mainland)
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You must have the [spell=129087] debuff while handing in the quests to satisfy the achievement's criteria. You will lose this debuff upon leaving the zone. To reacquire it, you must first abandon one of the quests and then reaccept it.

Each set of daily quests offer an additional quest after the completion of those that are initially given. You'll receive credit after turning this quest in.

Just so it's perfectly clear on which is which, because it wasn't to me at first and I don't think anyone's said it so plainly on this page:

Omnia Mystics: When The Dead Speak (The mogu on the Shan'ze Dao island.)

Wu Kao Assassins: Target of Opportunity: Sra'thik Hivelord (The mantids on Sra'vess island.)

Blackguard Defenders: Cheng Bo! (The yaungol on the mainland.)

Wow, instead of helping razzeldazle people downrate him for not knowing something. To answer your question, yes, only one set is available a day, and it is random. So if you're missing a set you just have to hope to get lucky and have that set the next day.