Throne and Liberty Black Anvil Defector
Black Anvil Forge Exploration Codex Entry

Objectives

Talk to Waturu at Herba Village Herba Command Post
Defeat Dwarf Commander at Black Anvil Forge and obtain the key
Enter Underground Mine and open the Map Chest that contains the location of the hidden Obsidian
Collect the Stolen Obsidian Collection Codex from the Map Chest
Refer to the Stolen Obsidian Collection Codex and find the Obsidian's location
Talk to Waturu at Herba Village Herba Command Post