An event, simply known as 'the Catastrophe' shook the New World to its core, diverging the new world's history from the original book. Now finding himself in a post-apocalyptic world and his guild base absolutely destroyed, Momonga began the search for his friend and the source behind the destruction.

Nigredo, Albedo, Citrinitas and Rubedo were the four stages of the Magnum Opus. While most believed that Tabula only created three NPCs, skipping Citrinitas like many writers after the 15th century. But what if this mysterious NPC actually existed? What if this NPC was transported to the New World? How would she interact with this new environment? And is she truly alone?

Ten years ago, in a far off land in the New World, an unspeakable phenomenon occurred. While most nations did not know what transpired or directly felt the impact. The butterfly effect had reshaped the world. What would newly transported Nazarick do in this New World? (AU, Elements are taken from the LN, the bonus volumes and Mass for the dead.)