This page contains a guide on how to get the Thief Key in Dragon Quest Heroes 2, including treasures chests that can be unlocked using it.
The Thief Key is an item that allows you to open special treasure chests in Dragon Quest 2. These chests usually contain Mini Medals or very rare equipment.
You’ll need to complete Side Quest 12 “Retrieve the Carved Message” to obtain the Thief Key. To access the quest, you’ll need to meet the conditions below.
Click here to view our Side Quest list.
You’ll need to have raised the Thief class to level 20.
After that, talk to the NPC at the back of Zebion’s church.
After talking to the NPC, head to the Orb Shop and buy an item that he sells (the item will not have a name) for 3000 G.
When you’ve met the conditions, that quest will activate. Head to Cretia for the quest.
The quest requires you to infiltrate a jail and retrieve the carved message. Follow the arrows indicated on the image, starting from S to reach G. The quest will end if you get spotted by any of the guards in the area. You can unlock the cell on F6 that will distract the guards, letting you sneak past them. Once you’ve reached area G and have watched the cutscene, just backtrack to S using the same directions as before. You will obtain the Thief’s Key as a reward for clearing the quest.
Below is a list of all Treasure Boxes that you can unlock using the Thief’s Key. A lot of Mini Medals can be obtained from these chests if you want to farm them, so it is worth getting the Thief key as soon as you can.
You can check out our guide on Mini Medals here.
Lastly, there is one treasure chest behind the Medal King in Zebion which contains a Bond Stone.