Wine Wars: Consorting - Toussaint (Blood and Wine)
Area: Plegmund's Bridge
Quest Giver: Automatically started upon completing Wine Wars: Deus in the Machina
Other Requirements: Do not complete Wine Wars: Vermentino or Wine Wars: Coronata
This quest is automatically acquired upon turning in the Wine Wars: The Deus in the Machina quest. All this quest is, is Wine Wars: Vermentino and Wine Wars: Coronata combined into one. All of the objectives will be the same and any progress you made on the previous two quests will be carried over into this one. Additionally, the previous two quests will be completed.
Both of the quest items that you need to loot in order to unlock the Wine Wars: The Deus in the Machina are shown on my maps below. It's highly recommended that you collect both of these items then complete Wine Wars: The Deus in the Machina quest; this is the only possible way to unlock this quest. This also allows you to get the most out of the Wine Wars quests.
Warning: Completing either of the Wine Wars Vermentino or Coronata quests before turning in Wine Wars: The Deus in the Machina will make it impossible for you to get this quest.
Once you complete the Wine Wars: Consorting quest and turn it in you'll receive an additional quest, Wine Wars: Belgaard. This is actually a different quest than the previous one of the same name and it appears as a different entry in your quest log as well as is 2 levels higher.