The Left Piece of Lord Valthalak's Amulet

During the quest chain to upgrade the Dungeon Set 1 Helm and Chestpiece to Dungeon Set 2, adventurers will have to complete a quest called The Left Piece of Lord Valthalak's Amulet. This quest could be one of four quests:
*Stratholme - Use the Brazier of Beckoning in Scarlet Stratholme to summon forth Jarien and Sothos and slay them.
**Preceeding Quest: Components of Importance (Tyr's Hand)
*Scholomance - Use the Brazier of Beckoning in Scholomance to summon forth the spirit of Kormok and slay him.
**Preceeding Quest: Components of Importance (Purgation Isle)
*Lower Blackrock Spire - Use the Brazier of Beckoning in Lower Blackrock Spire to summon forth the spirit of Mor Grayhoof and slay him.
**Preceeding Quest: Components of Importance (Hive'Regal)
*Dire Maul - Use the Brazier of Beckoning in Dire Maul to summon forth the spirit of Isalien and slay her.
**Preceeding Quest: Components of Importance (Frostwhisper Gorge)
The Left Piece of Lord Valthalak's Amulet