Wow, thank you so much for the feedback! this is really in-depth feedback, I think we can improve the quality a little more.
In fact, if you run those four at the same time, the work speed will slow down. If you keep them all in one place, it takes about 2 days for the prophecy to become confirmed, but I think the quest description was a bit lacking!
I'll try to change it to be more intuitive. Thank you!