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Shards Unknown
Investitures Yolish Lightweaving, Microkinesis
Universe Cosmere
Featured In Dragonsteel

There is an original, shrouded and hidden somewhere in the cosmere. I've yet to find it, but I have found stories.

Yolen is a planet in the cosmere where the Shattering of Adonalsium happened.[2][3] It's the homeworld of all the original Vessels, along with Hoid and Frost.[4][5] The inhabitants of Yolen are called the Yolish.[6]

Yolen is the setting of the unpublished novels The Liar of Partinel, The Lightweaver of Rens and Dragonsteel Prime.[7] Dragonsteel proper, the prequel to the cosmere as a whole, will be set there.[8]

Geography and Ecology[edit]

Very little is known about Yolish geography, other than that it has some unusual features.[9] Its gravity and other measurements are considered the cosmere standard by cosmere-aware scholars like Khriss.[10] Its ecology is divided into two distinct parts. Parts of it are similar to post-Catacendre Scadrial, with similar flora and fauna. These parts are called trune.[11] Other parts are covered in fainlife, a poorly-understood, parasitic ecosystem hostile to humans.[10][12] Although fain has the shape of ordinary flora, the plants and land overtaken by it are bone-white, and spill red liquid when crushed or snapped.[13] There is something similar to a perpendicularity on Yolen, despite the lack of a Shard.[14]

One form of known fainlife are Tamu Keks, which are similar to singer gemhearts,[15] and can be used for inter-Realmatic communication.[16]

Yolen is home to three sapient races: humans, dragons and Sho Del.[17] By Rosharan year 1174, Frost is the only known inhabitant, and though there are more people living there, the Yolish population is rather small.[18][19] While not all humans originated from Yolen, it was the first world on which they've appeared.[20] Many languages currently in use across the cosmere are derived from Yolish ones.[21][22]

Yolen has a strange astronomy that would be impossible under ordinary laws of physics.[23]


On Yolen, Dragons were seen and worshipped as gods.[24]


Yolen is one of the oldest inhabited worlds in the cosmere, and the first on which humans have appeared.[20] It's also the homeworld of Adonalsium, the entity believed to be the cosmere's creator deity.[25] At some point, fain either appeared or traveled there, and began spreading, overtaking the original landscape. After some time, the original inhabitants learned how to deal with it and keep it back.[12]

I learned it many, many years ago from a man who didn't know who he was, Your Majesty. It was a distant place where two lands meet and gods have died. But that is unimportant.

Hoid referencing Yolen while explaining his style of storytelling to Siri.[26]

At some point, sixteen Yolish people,[27] not all of whom were human,[4] came together to kill Adonalsium for various reasons.[1] The Shattering of Adonalsium, as it came to be known, dramatically altered the entire cosmere. All Investiture that once belonged to Adonalsium was divided between the Shards created by its death, and the preexisting magic systems were altered in how they functioned.[28][29]

Following the Shattering, most Shards left Yolen to go their own separate ways.[30] Many humans have also abandoned it, spreading across the cosmere.[21] Over the following millennia, it has become hidden in some way, shrouded from prying eyes, making reaching and researching it extremely difficult.[1] By the time of the True Desolation on Roshar, its remaining population is very small.[19]


Yolen appears to have several magic systems, though only two are known.


Lightweaving is cosmere's original illusion magic. It's capable of creating auditory and visual manifestations, either independent or attached to a host.[6] It can produce disguises, as well as alter the appearance of other substances, like smoke.[31][32] It's most similar to the Surge of Illumination from Roshar, albeit less restrictive, not requiring a spren bond.[33] Hoid learned this original form of Lightweaving on Yolen.[26]

The Shattering appears to have changed something in Lightweaving, as the original magic is only semi-functional.[34]


Prior to the Shattering, Yolen was host to some form of magic related to the manipulation of atomic particles, known as axi.[35] The power allows its users to observe atoms and interact with them directly,[36] although they are incapable of creating nuclear fission.[37] Axi can also be used to refer to the smallest theoretical division of matter.[35]

Notable Yolish[edit]



  1. a b c Mistborn: Secret History part 3 chapter 2#
  2. Skyward San Diego signing
    Arcanum - 2018-11-07#
  3. General Reddit 2015
    Arcanum - 2015-06-02#
  4. a b Kraków signing
    Arcanum - 2017-03-21#
  5. Oathbringer San Diego signing
    Arcanum - 2017-11-14#
  6. a b Oathbringer Ars Arcanum#
  7. Barnes and Noble Book Club Q&A
    Arcanum - 2009-07-08#
  8. Salt Lake City Comic-Con 2014
    Arcanum - 2014-09-04#
  9. /r/books AMA 2015
    Arcanum - 2015-04-07#
  10. a b Arcanum Unbounded - The Scadrian System#
  11. RoW Release Party
    Arcanum - 2020-11-17#
  12. a b TWG Posts
    Arcanum - 2007-02-12#
  13. JordanCon 2018
    Arcanum - 2018-04-22#
  14. JordanCon 2021
    Arcanum - 2021-07-16#
  15. BookCon 2018
    Arcanum - 2018-06-01#
  16. Shardcast Interview
    Arcanum - 2021-01-23#
  17. Stormlight Three Update #4
    Arcanum - 2016-09-28#
  18. Arcanum Unbounded Fort Collins signing
    Arcanum - 2016-11-29#
  19. a b Calamity Chicago signing
    Arcanum - 2016-02-22#
  20. a b General Twitter 2016
    Arcanum - 2016-01-03#
  21. a b Stormlight Three Update #4
    Arcanum - 2016-10-03#
  22. JordanCon 2021
    Arcanum - 2021-07-16#
  23. General Reddit 2022
    Arcanum - 2022-04-01#
  24. Tress Spoiler Stream
    Arcanum - 2023-03-31#
  25. The Great American Read: Other Worlds with Brandon Sanderson
    Arcanum - 2018-10-25#
  26. a b Warbreaker chapter 32#
  27. Words of Radiance Philadelphia signing
    Arcanum - 2014-03-21#
  28. Oathbringer London signing
    Arcanum - 2017-11-28#
  29. Leipzig Book Fair
    Arcanum - 2017-03-24#
  30. Oathbringer chapter 39 epigraph#
  31. White Sand vol.1 release party
    Arcanum - 2016-06-28#
  32. Oathbringer release party
    Arcanum - 2017-11-13#
  33. Orem signing
    Arcanum - 2017-12-21#
  34. Skyward release party
    Arcanum - 2018-11-06#
  35. a b Skyward Pre-Release AMA
    Arcanum - 2018-10-22#
  36. Stormlight Three Update #4
    Arcanum - 2016-10-19#
  37. Leipzig Book Fair
    Arcanum - 2017-03-24#
  38. OdysseyCon 2016
    Arcanum - 2016-04-08#
  39. Shadows of Self signing London UK
    Arcanum - 2015-10-19#
  40. The Way of Kings Annotations
    Arcanum - 2017-11-10#
  41. Arcanum Unbounded San Francisco signing
    Arcanum - 2016-11-30#
  42. Warsaw signing
    Arcanum - 2017-03-18#
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This page contains most of the knowledge we have on the subject at this time.
It has yet to be reviewed.