Book of Clouds

The Book of Clouds is the original work of Heathcliff, a former White Tower Master who spent decades studying climate and atmospheric movement. The book records weather and wind magic at a level that makes it one of Heinrich's most valuable acquisitions and later gives Theodore Miller both technical knowledge and a Synchro with its author.

History

Heinrich's collection

Heinrich acquires the Book of Clouds for his private library in Sipoto, where Viscount Brahms tries to force him to surrender it. Theodore intervenes before Brahms can kill the collector. When Theodore later proposes exchanging accurately translated Eastern books for works from Heinrich's collection, Heinrich reveals the white-covered original in his secret study. Because duplication magic does not work on it, some observers mistake it for a grimoire, although Theodore rejects that classification after his experience with genuine grimoires. (Chapters 233–234)

Gluttony's Appraisal identifies the work as a Precious-rated magic book about climate, atmospheric currents, and magical reproduction of weather phenomena. Theodore and Heinrich include it in their voluntary barter, one of dozens of exchanges guided by their shared interest in knowledge rather than market value. (Chapters 234–235)

Consumption and inheritance

Theodore had once struggled with a manuscript of the work in the White Tower, but the incomplete wind divinity in Aiolos' Pocket allows him to understand the original with unexpected speed. Once his comprehension passes Gluttony's threshold, he consumes the book. The process maximizes his wind affinity, grants meteorological knowledge, and opens a Synchro with Heathcliff. (Chapter 235)

Heathcliff explains that his study of weather developed into a limited form of foresight: the clouds he perceives change with approaching danger, and he warns Theodore of a future enemy stronger than he had been in life. He then transfers Cloud Magic and a large body of meteorological knowledge. Theodore cannot receive Supercell, Heathcliff's personal Sorcery, because his circles are already burdened and he has not reached the required level. (Chapters 235–236)

Abilities and properties

• Meteorological theory: The book explains climate, atmospheric currents, and weather phenomena through observations gathered across decades of continental travel. (Chapter 234)
• Wind development: Consumption greatly raises wind affinity and grants Theodore meteorological knowledge. His existing wind divinity amplifies the resulting growth but is not itself a property created by the book. (Chapters 234–236)
• Cloud Magic: Heathcliff transfers his developed system for understanding and controlling clouds, wind, lightning, and broader weather patterns. The inherited knowledge is extensive, but Theodore must still embody and practice it. (Chapter 236)
• Supercell clues: The text contains clues to Heathcliff's peak weather Sorcery. Appraisal requires either the eighth Circle or maximum wind affinity, and Heathcliff still refuses an immediate transfer because Circle Overload would make the power a burden. (Chapters 234 and 236)
• Weather foresight: Heathcliff's mastery lets him interpret cloud imagery as warnings of dangerous choices and distant disasters. The corpus presents this as an advanced result of his meteorology, not a guaranteed ability for every reader. (Chapter 236)
• Resistance to duplication: Ordinary duplication magic cannot reproduce the original, though a difficult manuscript exists in the White Tower. The book is still appraised as a magic book rather than a sentient grimoire. (Chapters 234–235)

Ownership and custody