Be It Ever So Humble... Main Story, Blood and Wine Quest
Suggested level: 49
This quest will be triggered or can be aquired when you complete Burlap is the New Stripe, Pomp and Strange Circumstance quests.
Stages of "Be It Ever So Humble..." quest
1. Go home.
Geralt decided to go home to Corvo Bianco.
You have a visitor, it could be Triss, Yennefer or Dandelion.
2. Quest completed.
At his new abode, an unexpected guest awaited... Yet it was someone Geralt was more than glad to see.
Regis left a gift for you in your house in Corvo Bianco Vineyard. It's the Mutagenerator.