Received from: Automatically after talking with Dethmold during The Blood Curse.
Step 1: Get through the mist and ask about the standard on the other side
Complete the part of The Blood Curse during which you go through the mist.
After reaching Vergen, you will be stopped by Cecil Burdon and Skalen Burdon beside the entrance (M27, 1). Ask them about the standard and they will show you the location of the catacombs, where the item might be.
Step 2: Find the catacombs entrance and the standard hidden inside
Obtaining the standard is identical as during Iorweth's path. You can find a detailed description of the mission in [ Act 2 - Iorweth - main missions ] Death Symbolized.
Notice! If you decide to deceive the wraith, the last question in case of Roche's path is a bit different, with the proper answer being: " A priest led me to safety".