The Left Piece of Lord Valthalak's Amulet (Stratholme)

Objectives
Use the Brazier of Beckoning to summon forth Jarien and Sothos and slay them. Return to Bodley inside Blackrock Mountain with the Left Piece of Lord Valthalak's Amulet and the Brazier of Beckoning.
 * slain
 * slain
 * Left Piece of Lord Valthalak's Amulet
 * Brazier of Beckoning (Jarien and Sothos) (Provided)

Description
The siblings, Jarien and Sothos, decided to join the Scarlet Crusade upon the disbanding of our mercenary company. They took the Left Piece of Lord Valthalak's Amulet with them. Good riddance, I say, but we need that piece back.

From what we could gather, they were actually slain by Grand Crusader Dathrohan himself for failing the initiation rites inside his chamber in the Scarlet Bastion.

In any case, we... meaning you, are still going to need to retrieve that piece of the amulet.

Rewards
Upon completion of this quest you will gain:
 * 11900 XP (or a compensation at level 80)

Progress
Does this mean then,, that you've already put the souls of those two fools to rest and retrieved the Left Piece of Lord Valthalak's Amulet?

Completion
I suppose it's for the best that the souls of those two have finally been put to rest, even if I didn't like them while they were alive. In any case, we have what we were after, and that is definitely a good thing!

Unfortunately, I do not know the location of the one who died with the right piece of the amulet in their possession. But do not fear; in life I was a dabbler in the art of divination, so I have another task for you, which is going to enable us to ferret out the final piece.