The story is Helix Intercalculator – and it’s a story about a wizard and a priestess who come across some unsettling truths about the nature of their world.
Some more about this publication:
The Society of Misfit Stories is a home for those wonderful stories that are too long for most magazines but too short for stand-alone print books. Whether you call them short stories, novelettes, or novellas, these stories are all of a length that often struggles to find publication traditionally. Each issue offers a substantial volume of amazing speculative fiction for readers who enjoy spending time with a good tale.