As was announced, everyone will receive 5 free stones due to Max Murai’s no continue clear of Beezlebub and the schedule for the distribution of the stones has been announced. The stones will be distributed daily between 11/6 and 11/10 for a total of 5 free stones. It isn’t 100% clear but this may possibly mean that there won’t be an event starting next week as then you would have double stones on 11/9 and 11/10 (Friday and Saturday) since events always start on Friday. This may mean that once skill up x2 ends with the current event (in relation to the Piedra dungeon) it may not be back up before the dungeon is gone.
Also, as a special bonus, there will also be a return of the Tama-dora dungeon from 11/6 through 11/10 as well.