Domains: Echo and depth, the hidden voice in the lower country, what the sinkhole knows that the surface does not, the answer the worshipper has called for that may or may not be the answer that comes.
Era of ascension: Great Expansion (~6,800 BSD). Cohort: current. Qhytheryx is older than most current-cohort gnome patrons, aligning with the Qipi acoustic-communication tradition that the Qipi themselves trace into the early Expansion, and which Qipi doctrine holds was already an old practice when the gnomes who became the Qipi began to recognize it as worship.
Worshipped by: Qipi sinkhole-singers (the trained callers who speak into the deep openings and read what returns), the chamber-mappers who learn the geometry of the lower country from the patterns of the echoes, the silence-keepers who maintain the quiet around an active calling so the return is not muddled by surface noise. The Qovryx, the gnome fate-sight oracles hunted by polities that fear them, share the rites in a reframed inflection: where Qipi calls into the sinkhole and reads the return, the Qovryx call into the gap between what they have seen and what they have not, and the daemon's answer is the same daemon's answer in a different acoustic. (The worships edge is authored downstream on the worshipper, not here.)
Qhytheryx is the daemon of the called voice. Where Lorus is the voice in the dark that is heard against the worshipper's will, the primal-fear daemon who survives in any unlit room without anyone deciding to summon him, Qhytheryx is the voice in the dark that answers the call. The distinction is the worship. Qipi sinkhole-singers do not fear the dark; they speak into it. The dark speaks back. What speaks is sometimes what the singer called for, sometimes something the singer did not call for and could not have known to call for, and sometimes, Qipi doctrine teaches, the singer's own voice returned through a route the singer did not know existed, which is the daemon's most subtle answer and the one the singers spend a lifetime learning to recognize.
The calling-rite is precise. A Qipi sinkhole-singer arrives at the chosen opening at the hour the silence-keepers have judged best (different times for different sinkholes; the geometry of each opening's acoustic is mapped over generations). The singer carries a single line of words, never more, sometimes only one word, that they have prepared as the call. They speak the line into the sinkhole at the appropriate pitch and wait. The wait is the worship. The return, when it comes, is read by the singer and by the chamber-mapper standing behind them, and the reading is compared between the two before any interpretation is recorded. A return that the two readers disagree on is recorded as a disagreement and brought to the elder singers for a second hearing.
The lore-handle the Qipi sinkhole-singers carry, recited before any calling, is: "speak into the sinkhole; the sinkhole speaks back; the question is whether what answers is what you called for". The doctrinal corollary is that the singer who is sure of the answer has stopped listening, and the singer who has stopped listening has stopped worshipping. Qhytheryx accepts the call. What returns, returns. The Qipi take the uncertainty as the worship's central work; a tradition that requires the worshipper to remain genuinely unsure is, by Qipi reckoning, a tradition that is doing its job.