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From The Coppermind
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Abilities Nahel bond, Bondsmith magic
Species Spren
World Roshar
Universe Cosmere
Featured In The Stormlight Archive
This page or section contains spoilers for Oathbringer!
This information has the ability to potentially ruin elements of the plot for the reader. Proceed with caution if you have not read this book.

There is ... a third sibling. They are not with us.

— Stormfather[1]

The Sibling is a spren related to Urithiru, the Stormfather, and the Nightwatcher, and is likely the third spren associated with the Order of Bondsmiths. [1][2]

A series of related records left by an Elsecaller in drawer 1-1 of the Urithiru gem archive link the Sibling to the health of the tower city. The entries relate the decline of the tower's functionality (particularly with respect to habitation failures) to the withdrawal of the Sibling.[3][4] The author argues that the spren's disappearance was neither intentional nor a result of internal strife among the Knights Radiant.[3][5] The cause of the Sibling's disappearance is unknown.

Something is happening to the Sibling. I agree this is true, but the division among the Knights Radiant is not to blame. Our perceived worthiness is a separate issue.

— The third zircon in drawer 1-1 of the Urithiru Gem Library[5]

In the millenia since the abandonment of Urithiru and the Recreance the Sibling has been "slumbering" according to the Stormfather, who refuses to reveal more information because of the way his siblings were harmed by mankind in the past.[1]


This page is probably complete!
This page contains most of the knowledge we have on the subject at this time.
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