How to Craft and Upgrade your Legendary in Shadowlands - Comprehensive Guide - YouTube
Legendary crafting! Bring a base item (crafted with Tailoring, LW or BS), choose an effect from those you learned, add two secondary stats runes (crafted with Inscription) and voilà, custom Legendary! :
Professions in Shadowlands - Legendary Crafting, Optional Reagents, Star Ranks - Wowhead News
How to Upgrade Legendary Items to Rank 7 in Shadowlands Patch 9.2 (Eternity's End) - World of Warcraft - Icy Veins
How to upgrade your Shadowlands Legendaries to rank 7 in patch 9.2