I'm sorry that you failed to reclaim Siel's Western Fortress, but don't be discouraged.

I know of another way to get the Balaur's hidden treasure.

Player: "Spill it."

I see you're interested.There is another passage to Left Wing Chamber. It was built for infiltration.It is inactive due to a lack of power, but you can reactivate it if you have a power source as strong as Siel's Western Fortress Artifact Shard.This is a great chance to get all the valuables the Balaur have stashed in Left Wing Chamber.What do you say? Want to give it a try?
Player: Accept

Go into Left Wing Chamber and defeat as many Balaur as possible, including Treasurer Nabatma.

You need to hurry, though. Once the Balaur's protective magic ward is activated, the treasure chests will begin to disappear one by one.

Player, you can do this.

Player: "I got it."

You're back! I've been waiting for you.

Did you eliminate all the Balaur nesting in Left Wing Chamber?

And did you get their treasure?

Player: "I've dealt with them."

Excellent!

I'm glad to hear of the Balaur's fate, Daeva.

Here it is. Player. The reward Sanctum prepared to praise your distinguished service.

I look forward to your continued support for the prosperity of Elyos.