Domains: Childbirth, infant survival, the first year.
Era of ascension: Age of Craggus (~43,000 years ago) — among the earliest of the Craggus-era daemons, ascending in the same generation as Craggus himself. Cohort: dead. Died: Lost Ages (~30,000 years ago), when the Laughing Plague killed mothers and infants together and the act she presided over became, in most polities, statistically unsurvivable.
Worshipped by: The midwives of the Craggus era, the mothers themselves at the household-rite level, and the small obstetric orders that the rebuilding polities funded out of grim necessity. Her cult was the most demographically central of the Craggus-era pantheon — every birth was hers, and the Craggus era was a civilization rebuilding from a survivor population that had been counted in tens of thousands. No living culture maintains her worship. (The worships edge is authored downstream on the worshipper, not here.)
The Long Winter had nearly extinguished mankind. The Craggus era's foundational labor was therefore demographic — the rebuilding of a population, not the rebuilding of a city — and Hellaréth was the central religious figure of that labor. Yelláreth of the Golden Age had presided over the safe-birth thanks at the household level, in an age when births were common enough that the rite was routine; Hellaréth's worship was the same office at a different scale, in an age when every infant carried to term and every mother who survived the bed were specific persons whose survival the polities measured. Her midwives kept the birth-tallies that the Craggus-era census drew its early figures from.
The Plague killed her with appalling specificity. The disease's involuntary convulsive laughter was particularly lethal to pregnant women — the texts of her cult record this in detail — and infants did not survive their mothers' onset by more than hours. The first year of life, which her doctrine had specifically claimed as the dangerous interval where the goddess's attention was most needed, became universally fatal across infected communities. Her midwives died alongside their patients; her household rites went unspoken at births that nobody survived to celebrate. The cult ended where the demographic curve crossed the floor: she could not be sustained as a goddess of safe birth in a world where no birth was safe.
Distinct from Harath, whose healing is general; distinct from Yelláreth, whose office she inherited at higher specificity and across a different age. The Plague did not respect the inheritance.