Forge the Aurifer by treating Ivan's Lapis Fictus knife with electricity, Putrefactio mercury, then moonlight. The Tenebris Somnia Aurifer comes right after Julia's Desiderium: you need the knife from Ivan's red statue, and Aurisatio is the key to separating it from the statue.
Where is Ivan's Lapis Fictus knife?
The Lapis Fictus knife is held by Ivan's red statue beside the television. Examine the statue: Julia identifies its knife as the weapon she can use for the book's recipe.
Your immediate problem is separating the knife from the rest of the statue. Prepare Aurisatio for that task before moving on to the weapon's elemental treatments.
How do you prepare Aurisatio with blood and burned film?
Put blood from Julia's wounded hand into the Glass vase, place developed film in the vase, burn it in the oven, and expose the mixture to sunlight. The chemistry book explains why the Aurisatio burned film recipe works: burning already-developed film produces a liquid containing chemicals used in its development.
Collect blood in the Glass vase
Put some blood from the wound on Julia's hand into the Glass vase. Julia's dialogue explicitly names her hand wound as the blood source for the mixture.
Put the developed film in the vase and burn it
Place the film inside the container, then burn it in the kitchen oven. You need the liquid left by the burned film for the mixture.
Break the sulfur statue to continue toward the light
After burning the film, the mixture still needs sunlight. Break the sulfur statue in the waiting area to progress through the light sequence.
Put the film in the vase before trying to burn it. Also, break this sulfur statue even if protecting statues earlier has made you hesitate. Leaving it intact keeps you stuck at the light requirement.
What is the Aurifer golden blade recipe?
Treat the Lapis Fictus weapon with electricity first, mercury from Putrefactio second, and moonlight last. Ancient Book page 15 gives this order and identifies Putrefactio as the deepest point of the Desiderium.
- Revitalize the weapon with electricity.
- Descend to Putrefactio and immerse the weapon in its mercury pool.
- Bathe the weapon in moonlight to finish the Aurifer.
Keep the light requirements straight: sunlight belongs to the Aurisatio mixture, while moonlight is the final treatment for the weapon.
The result is the Aurifer, the golden blade. It can destroy a Relicta in its mercurial form with a touch of the blade, eliminating it from all planes.
With the Aurifer forged, continue to the final boss walkthrough for the confrontation ahead.