Quick answers
- Pick up
- Acolyte Magaz, The Barrens(62.6, 35.2)
- Hand in
- Menara Voidrender, The Barrens(62.5, 35.4)
- Where
- around 53, 78 in Desolace
- Level
- Level 40 quest, available from level 35
- Rewards
- 2,350 experience
- Previous quest
- Fragments of the Orb of Orahil
Objectives
Take the Infus Emerald and use it on one of the Infernals found in Desolace. After successful, bring the Infus Emerald and the Imprisoned Infernal Spirit back to Menara Voidrender in the Barrens.
Provided: 
Infus Emerald
Description
So, you have chosen to capture the soul of an infernal, good.
Take this emerald--with it, you will be able to capture the creature's soul. It works very similar to spells you already know: when the creature is close to dying, use the gem and it should do the rest of the work for you.
I would suggest going to Desolace and trying your hand at any of the infernals there. Those should do nicely.
After you're successful, take both the captured spirit and your emerald to Menara.
Rewards
Experience: 2,350
When you come back
Yes, ‹name›? Have you chosen? Infernal or felhound?
Each choice is personal and should reflect your strengths and weaknesses. It is not unheard of for a warlock to enhance themselves further instead of making up in areas they lack. Sometimes overpowering an enemy is just as strong a tactic than becoming a more balanced spell caster.
On completion
Ah, the spirit of an infernal. Well done, ‹name›.
When I have both the spirit and the cleansed orb, I will merge the two for you, but not until then.
Quest chain
2 quests, level 40, 5,500 experience in total.
- 1
[40]Fragments of the Orb of OrahilMenara Voidrender · The Barrens3,150 XP
- 2
[40]Shard of an Infernal This quest Acolyte Magaz · The Barrens2,350 XP