Here's the temple without characters:

Ayauhcalli temples were centers of purification, among other functions, including the famous ritual of the New Fire. The Poyauhtecatl was perhaps the most important natural sanctuary for Tlaloc, reason why it was also called "Tlalocan." Sources indicate that the mountain had two ayauhcalli temples, one at the summit, and another somewhere on its eastern slopes, but this one is a third fictional one on its western slopes.

Ayauhtli hasn't appeared in Codex Black yet, but curiously, she's the oldest character of the entire cast. I invented her even earlier than Donají or Itzcacalotl, although her first iteration didn't have any sort of backstory.