Oathstone

An Oathstone stores magical oaths made to an institution rather than forcing every new ruler to receive the same oaths personally. The best documented specimen is Lanthanor's royal Oathstone, a physical component of the Ruler's Inheritance and one of Daneel Anivron's principal command links after he takes the throne.

History

A safer focus for institutional oaths

Magical oaths attach a string-like bond to the soul. Repeated person-to-person bonds can accumulate until the soul shatters, causing irreversible death, so kingdoms use an Oathstone as a common focus: officials swear to the stone and its current master can enforce those existing bonds. The oath still requires genuine assent when made; an oath extracted without free will does not form correctly. Typical Oathstones are manufactured from Ker Gems with Hero-level formations, while a rarer kind formed at a Hero's death can stand in for the World's Will in unusually deep inheritance workings. (Chapters 87, 120, and 604)

Lanthanor's royal succession

When Lanthanor's former king died, the blood-bound Oathstone left his body as a round yellow stone, roughly half a head in size, whose murky interior seemed to swirl. Daneel bound it with his own blood; it liquefied, entered through his skin, and transferred the active institutional oaths to him. The binding gave him private communication with oath-takers such as Kellor, Cassandra, and Luther, allowing him to relay orders and receive urgent reports without a separate handheld receiver. (Chapters 89–91)

The same stone fits a groove in Lanthanor's palace pedestal and identifies the ruler to the Ruler's Inheritance. Through that interface Daneel communicates with the Empire Spirit and gains access to sealed royal knowledge. Its administrative use continues well beyond the coup, including contact with agents and sworn personnel across kingdoms and sects. Other organizations, such as the Withering Leaf Sect, maintain their own stones and can release members from those separate institutional bonds; those objects are not the Lanthanor relic. (Chapters 94–103, 208–209, 361–362, and 395–410)

Strong bonds with practical limits

An oath-link is complex enough that even powerful formations may only conceal the oath-giver's location rather than erase the connection. It is not an unrestricted communications system, however: Ashahell's isolation of the palace prevents Daneel from sending messages through it, and later barriers can similarly deny location information. Ordinary magical oaths can also be unraveled over time by Champions or Heroes; the text does not establish that Lanthanor's Oathstone makes every promise immune to all stronger intervention. (Chapters 433–437, 771, and 846–871)

Abilities and properties

• It centralizes institutional oaths, sparing a soul from the dangerous accumulation of separate bonds to successive rulers while allowing the current blood-bound master to administer existing promises. (Chapters 87 and 89)
• Lanthanor's master can communicate privately with oath-takers, issue orders, receive messages, and normally use the link to help locate them. Strong isolation formations can block communication or conceal location. (Chapters 89, 395–410, 433–437, and 771)
• The Lanthanor stone serves as the physical key to the palace's Ruler's Inheritance pedestal and its Empire Spirit archive. This function belongs to that royal specimen rather than to every Oathstone as a class. (Chapters 94–103 and 361–362)
• Oaths require assent when sworn. Conventional oath bonds are formidable but not absolutely permanent against sufficiently powerful cultivation or specialized countermeasures. (Chapters 120 and 846–871)

Ownership and custody