First you need to meet this guy on the middle of the map,
Vendor
Allows you to buy a
Treasure Hunter
Submit Civil Servant Egg - Allows you to trade collected
If you still haven't notice it, the whole point of Treasure Land Event is to tame
But Pet Taming chance is gradually reduced inside the map not only that players can Tame-Steal or simply kill Civil Servants to annoy everyone.
You only have an hour to collect as many eggs as possible and exchange them for Treasure Bag thru Treasure Hunter NPC.
If your tired or all zennies got burned then you can return to Prontera via
Warp Out