WoW The War Within adds the usual slew of challenging PvE content, and a few core systems are returning, too. One of them is The Catalyst—an important interactable workbench in Dornogal where you can transform certain armor pieces into tier set pieces using Harmonized Silk.

If you’re wondering how to get Harmonized Silk, how often you can get it, or how to use it, you’re in the right place.