Domains: Ancestor voice in the cold, the unbroken line, the wind that still answers a name when the name is spoken correctly.
Era of ascension: Great Expansion (~6,200 BSD). Cohort: current. Khalweir rose with Neth's tundra-clan consolidation, when the old habit of speaking to one's grandmother at the hearth-edge in winter became formalized into a discipline the clan-elders could teach.
Worshipped by: Neth tundra-clan elders, the line-keepers (women trained from girlhood to memorize the genealogy backward through twelve generations), the breath-readers who interpret what direction the cold returns from when an ancestor is called. Shyona Ve plains ceremonialists keep his rites in a reframed inflection: where Neth doctrine treats the ancestor's answer as cold-wind across the tundra, Shyona doctrine treats it as plains-wind across grass, and the Shyona ceremonialist faces a different direction at the calling. The two cultures recognize each other's worship as the same worship in two languages, which is rare. (The worships edge is authored downstream on the worshipper, not here.)
Khalweir is the daemon of the living conversation with the dead, and the gap his worship fills was opened by Mernath's death in the Lost Ages. Mernath had been the daemon of grief — of mourning what was lost, of keeping the records of who had died. Khalweir is the daemon of speaking with what was not lost. The distinction matters in Neth doctrine: a Neth elder will tell you that to grieve the dead is to admit they have gone, and Neth doctrine does not admit that. The dead are colder, and harder to hear over the wind of one's own breath, but they are not absent. The line is unbroken. The conversation continues.
The practice is specific. A Neth line-keeper at the year-turning sits at the lee of the clan's wind-stone, speaks the name of an ancestor twelve times — once for each generation between speaker and named — and waits. The cold returns through one of three openings cut into the wind-stone at directions the clan-elders have set by precedent; the direction of the returning cold is the ancestor's answer, and the line-keeper reads it. A first opening means yes. A second opening means speak again. A third opening means the question is wrong. The reading is taught from line-keeper to apprentice in a chain that the Neth claim has never been broken, which is the doctrinal claim Khalweir's worship rests on: the conversation has continued without interruption since the founding of the tundra clans.
Where Mernath organized grief as an archive — keep the names, write the dead — Khalweir organizes presence as a conversation. Neth doctrine teaches that Mernath's death was the failure of a daemon who had mistaken the records for the conversation. The Plague killed too many dead too fast for the archive to hold them, but the conversation does not require the archive; the conversation only requires a line-keeper who knows the twelve generations backward and a wind-stone that has not been moved. The lore-handle the Neth carry is: the dead are not gone — only colder, and harder to hear over your own breath. The discipline of the worship is mostly the discipline of breathing quieter.