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Alloy of Law is a term and book title referring to the Mistborn sequel series, which combines allomancy and feruchemy with an industrial revolution-like setting. Book: Mistborn series, second era.

Metallic Arts refer to the three magic systems of allomancy, feruchemy, and hemalurgy found in Mistborn series, all based on metals. Book: Mistborn series.

The Cognitive Realm, also known as Shadesmar, is a parallel dimension in the Cosmere where thoughts and beliefs shape the landscape. Books: The Stormlight Archive, Mistborn series.

The Diagram is a set of written instructions created by the character Taravangian in The Stormlight Archive, designed to save the world from the Desolation. Book: The Stormlight Archive.

Allomancy is a form of magic in the Mistborn series where users ingest and 'burn' metals to gain various powers. Book: Mistborn series.

The Physical Realm is the tangible world where the stories take place and characters interact in the Cosmere. Books: All Cosmere books.

Harmony is a new Shard formed by the union of Ruin and Preservation after the events of the original Mistborn trilogy. Book: Mistborn series, post-original trilogy.

Hoid is a mysterious character that appears in various forms across the Cosmere books, often playing the role of an informant or guide. Books: Mistborn series, The Stormlight Archive, Elantris.

Investiture is the term for magical power or energy in the Cosmere, and it takes different forms on different worlds. Books: The Stormlight Archive, Mistborn series.

Shardblades are powerful, ancient weapons in The Stormlight Archive that can cut through almost anything and are connected to the souls of dead spren. Book: The Stormlight Archive.

Highstorms are powerful, regular storms on Roshar that have significant religious, cultural, and magical importance, replenishing Stormlight for use in Surgebinding. Book: The Stormlight Archive.

Elantrians are beings transformed by the Shaod, possessing magical abilities and immortality in the city of Elantris. However, their powers wane after a cataclysmic event known as the Reod. Book: Elantris.

Breaths are units of biochromatic energy used for Awakening in Warbreaker, granting magical abilities and sentience to inanimate objects. Book: Warbreaker.

Shadesmar is the name for the Cognitive Realm on Roshar, characterized by a sea of beads representing the physical forms of objects. Book: The Stormlight Archive.

Surgebinding is the primary magic system of Roshar, granting various powers through a bond with spren. Book: The Stormlight Archive.

The Spiritual Realm is the most mysterious of the three realms in Realmatic Theory, where all things exist in their purest form. Books: The Stormlight Archive, Mistborn series.

Feruchemy is a form of magic in the Mistborn series where users store attributes in metals to be used later. Book: Mistborn series.

Shardplate is magically-enhanced armor in The Stormlight Archive that provides great protection and enhanced strength to its wearer. Book: The Stormlight Archive.

Hemalurgy is a dark art in the Mistborn series that involves stealing attributes from others by using metal spikes. Book: Mistborn series.

Spren are spirit-like beings in The Stormlight Archive that represent various concepts and emotions, and can form bonds with humans to grant Surgebinding abilities. Book: The Stormlight Archive.

Odium is a Shard whose Intent is hatred, and he is the main antagonist in The Stormlight Archive, seeking to dominate the Cosmere. Book: The Stormlight Archive.

Adonalsium is the original, omnipotent power in the Cosmere universe that was shattered into sixteen Shards. Books: Mentioned throughout the Cosmere.

Realmatic Theory is the Cosmere's metaphysical framework consisting of three realms: the Physical, Cognitive, and Spiritual. Books: Mistborn series, The Stormlight Archive.

Nightblood is a sentient, enchanted sword in the Cosmere that consumes the Investiture of those it kills and can corrupt or destroy on a massive scale. Books: Warbreaker, The Stormlight Archive.