Way to unlock the quest: Talk to Cole in Skyhold after you complete the Here Lies the Abyss main quest.
Quest giver: Cole (M12,19)
It is the only quest that you receive from Cole (M12,19) and which is recorded in your journal. After you complete Here Lies the Abyss, talk to the boy in the tavern, at the upper floor. He tells you about his fears and you receive a quest to find an amulet. You can do that by completing the Obtain Amulet for Cole operation. Then, return to talk to the boy.
The rest of the mission is a long cutscene, where you have multiple conversations. Finally, you can decide whether Cole becomes a human or a ghost - your decision will affect the favor that you receive from Solas and Varric. After you complete your tasks, you can talk to Cole, to see one ore cutscene, connected with the decision that you have just taken.
Rewards for completing the quest:
- Experience (lots)
- 400 Influence points
- 3 Power points