A father told us that, his son disappeared when he was doing archaeological research in the Ruins of the Ancients. His son's colleagues said that the monsters in the ruins started to freak out so they ran separately for their lives, and after that he was not able to reach his son.
Though the father hasn't found his son yet, but he wishes to kill all the monsters in the ruins so that similar events will not happen again.
Indeed, the monsters in the ruins have been a trouble for the archaeologists.
If we don't do something, it will take forever to understand the background and culture related to the ruins.