Event is very simple to participate and can be done by all:

A message will appear in the global chat with the following statement: "Há um tesouro perdido em Lorencia ou Dungeon = There is a treasure lost in Lorencia/Dungeon"

At this point, you should look for the trunk that is hidden outside the city:

If he finds him, he will have to attack him to open it and receive the prize.

Soon, you will be automatically mentioned in the global chat as a winner.

Items 400, 380, 360 or pack of jewels.

Schedule of events available at http://en.megamu.net/info