Till Death Do You Part is a side quest in Witcher 3: Blood and Wine, in which you get to facilitate a divorce between two ghosts.

Key Facts
Level:	36
Location:	Toussaint
Category:	Side Quest
Reward:	“Forged in Fire” magic steel sword or Several gwent cards

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Go to the notice board and pick up the note called “Contract: Quarelling at The Cemetery”. Go to the Clever Clogs tavern and talk to the quest giver in order to start it. He’ll send you to investigate strange sounds coming from the cemetery.

Walkthrough

Following contains quest spoilers. You’ve been warned

Using your Witcher Senses, search the cemetery for the source of the noises.

Make sure you explore the part above the ground – the cemetery itself. You’ll find several clues which Geralt will dismiss, so you’ll have to return at night. Once you’re back, follow the sound into the catacombs and the small crypt to the left of the entrance.

Take Louis or Margot’s urn from the crypt.

After discovering it was the ghosts making the noises, you’ll have to choose who to evict. Both of them have a right to a place in the crypt, but one has to go. Choosing which one will determine the reward.

Choice 1

Take Louis’ urn

If you choose to move Louis, Margot will tell you where she hid his lucky Gwent cards. You’ll then be able to go and retrieve them. You’ll have to fight three grave robbers while placing his ashes to rest, then a couple of Archespores near her stash.

Go around to the back of the house and climb up the crates to enter the garden.
The cards are buried by the rose bushes, next to the gate.

Choice 2

Take Margot’s urn

If you decide to move Margot, Louis will send you to a blacksmith who owes him. The blacksmith will give you a magic steel sword to pay off his debt.

Collect your reward for solving the mystery of the nocturnal noises at the cemetery.

Go back to Lanzano and tell him the truth when he asks you about what happened. This will earn you a virtue point which you’ll need to complete the quest “There Can Be Only One”.