Fool's Gold - p. 2 Dragon Age II Guide
Last update: 11 May 2016
Step 4: Find the treasure room
Whether Iwan gave you the rod or you have found it by his dead body, you have to head east now #1. Once you are on the top, click on an inactive golem #2 (M44, 10) which not only brings him to life but also makes him your ally for next several dozen seconds.
Now you have to slowly move north and fight hostile golems who come to life #1. Every time stay at the same place where golems came to life, so you'll never fight more than two monsters at once. It is good to fight them one after another #2 of course, and that's because they are very tough.
There are two groups of two golems to eliminate and a single one, who is located at the northern part of this path #1. After killing all monsters, you ally-golem will stop following you so in the next battle you will be on your own. Use the western stairs now #2.
Attack darkspawn emissary immediately #1 and then deal with hurlocks and hurlock bolters. You need to be hurry because a new ogre will appear here soon (M44, 11). Once he joins the fight, ignore him however and deal with new group of darkspawns running out from the side room #2.
Be sure that you've killed all hurlocks before you start fight the ogre #1, otherwise bolters' attack might deal massive damages to your party members. During the fight with the ogre try to use the surrounding pillars to your advantage and the beast will die soon #2.
You can now enter the northern room, where previously hurlocks where running out of #1. Go upstairs. After reaching the treasure room (M44, 12) you'll see that many of treasures are already stolen #2. But this doesn't mean that you won't find anything interesting here. You can find one chest and a barrel activating side quest among other things.
Unlocked side quest: Lyrium-Laced Bilge Hoop
Step 5: Return to Yevhen
Now you can leave the treasure room and use the stairs leading to the west #1. There will be no monsters to fight but you can look around for additional items. At the end you should reach a way out from the Deep Roads #2 (M44, 13).
Now you can return to the [Hightown - Merchants' Guild] location during the day. Find Yevhen again #1 and talk to him #2 (M3, 16). A reward will depend on how many of his sons you've managed to save. You can also tell him about Iwan's betrayal.