Probably not much to say, just make it short, accept the quest on the star icon, the ghost one. Then start hunting mobs, the pumpkin one when you killed 10 of them you can receive 1 reward. That reward can be as low as 50k up to 1b. This is the reason that mesos price suddenly drop so much.
So far the highest mesos I got is 1.9m ... lots of ppl already gotten 100m. If you get 100m and above, it will show in the mega on the chat to the whole world.
