Marten ID Tag

 
Weight: 0.1
Value: 0
Artifacts Skill to Identify: 18
Quest: Destinae DOminus, the beginning
Ascension; Spoiler
 
Found: Marten's Locker in the Arnika Jail.
 
Used: To gain access to the HLL building in Arnika.
 
The ID Tag must be in the party's possession in order for the scanner on the outer door to clear you and open the doors to the building. 

You can complete the game without ever entering this building. There's just an old codger awaiting within for any who will listen to historical ramblings.