Professions in Shadowlands will be significantly different than how they worked in Battle for Azeroth. This page provides an overview of the new items and professions changes in Shadowlands.

Crafting your own Legendary Armor is one of the new features in the Shadowlands expansion. This guide tells you more about the whole process and explains what you need to do to craft your first Legendary item.

Optional reagents are new types of reagents that can change the item level and the secondary stats of the items you craft. You can probably guess from its name, but it isn't required to fill the Optional Reagent slot when you create something, you can craft an item with no optional reagents or you can fill as many Optional Reagents slots as you prefer.