Travel to the Bone Pit during Act 2 and talk to Jansen after you had completed the Cave Crawling quest. If doing the quests one right after another, leave the Bone Pit, travel to any other location, and then re-enter it to trigger this quest.
Access the Bone Pit Mines through a new entrance further east. As Hawke faces undead opponents throughout this short quest, an Arcane Horror awaits in the central area.
You'll enter an abandoned section of Deep Roads with traps (standard trap behind the front doors of the 2 corridors - 20 cunning to detect and disarm - 100 XP/trap) and undeads. The Arcane Horror is supported by a Revenant and other undead troops, with the Skeleton Archers (no traps but there is a complex chest to unlock after the battle - 30 cunning to open - 150 XP).
Defeat them and return to Jansen for your reward (XP only, no money).
Notable items Edit
Damage: 26 physical damage
(43 per second)
+8 damage vs. Qunari
- Helm of the Emerald Knights
Requires: 22 strength
+239 nature resistance
Immunity to flanking
- 350 XP (first group of undead)
- 350 XP (second group)
- 550 XP (final group)
- 1000 XP (quest completion)
The mine is safe and Jansen and others can go back to work.
On the next visit, the Pick Up Pickaxes quest will be available.