Haven't heard of anyone getting it. I'm guessing that the next mark is 50 quests since no one had done it yet, but I'm not sure. I just thought someone would have tried already.
i dont know how to get to quest master i saw that for begginer it is 14 quests in a row without leaving the map u are in but then i tried and did it with 20 and nthing happened i just got quest begginer...
P.S. HOW CAN IT BE 50 QUESTS WHEN U CAN TAKE 20 MAX ??