The Witcher Gear and Grandmaster sets are the strongest pieces of equipment and weapons in The Witcher 3. This guide will tell you exactly where to find the master blacksmith in The Witcher 3: Blood and Wine DLC so you can decipher the more complicated diagrams and have them make you some of the best gear you can find.
First begin the quest titled Master Master Master Master! This quest becomes available as soon as you discover your first Grandmaster diagram, regardless of the diagram you will unlock this quest. If you haven’t found any yet the earliest I found one was doing the Contract: The Tufo Monster quest and then discovering the Scavenger Hunt: Grandmaster Ursine Gear in the same cave. For information on both of these check out our Witcher 3: Blood & Wine side quest guide. You can just go directly to Lafargue but may as well get the quest complete while you’re there.
Once you’ve got the quest fast travel to the Nilfgaardian Embassy. You will need to speak with several crafters here. Head to the more Eastern objective marker to speak with Grandmaster Smith Lafargue. If you speak with any of the others they will just give you his exact location so that’s an option too. Once you meet him for the first time you can then speak with him to unlock all of the Scavenger Hunt quests and collect all of the Witcher Gear in Blood and Wine.