Holy Dust in WoW TBC is used as currency for Aldor shoulder enchants in Shattrath City, specifically from Inscriber Saalyn in the Aldor Bank. It’s obtained by turning in Fel Armaments, and then spent on the Aldor’s inscription items and shoulder enchant rewards.

What to do with it

  • Take it to Inscriber Saalyn in the Aldor Bank in Shattrath City.
  • Spend it on Aldor shoulder enchant inscriptions.
  • Keep in mind that different enchants cost different amounts and may require certain Aldor reputation levels.

How it fits in

Holy Dust is part of the Aldor reputation grind in TBC, alongside items like Mark of Kil’jaeden, Mark of Sargeras, and Fel Armaments. If you are Aldor-aligned, it’s basically the token you use to buy the shoulder enchant upgrades you want.

Simple example

If you’ve been turning in Fel Armaments and stacking Holy Dust, you use that pile of Dust at the Aldor bank vendor to buy the shoulder inscription you need for your class.

TL;DR: Save Holy Dust and spend it at the Aldor vendor in Shattrath for shoulder enchants.