The blood elves in Azshara have developed a method for pulverizing the magical items they acquire. This glittering dust they produce differs from the components normally acquired by a disenchantment spell. When I sent my apprentice to trade for the dust, he was killed without hesitation. For that, they must pay. The time for talk is over, adventurer. Find the blood elves along the cliffs of Azshara and use more "persuasive" methods to acquire their glittering dust.