Take a classical Spiritual Cultivation world facing an impeding demon war, add a hero summoning seeking starry eyed young adults ready to be conscripted to face all the evils of the world the currently powerful can't be arsed to, and add one bitter old pagan ex soldier who takes his nieces place in the summoning.

How will a modern soldier and half trained pagan fare in a world based on classical Asian cultivation mythology?
NaNoWriMo2023 project, so not a lot of editing will be happening for a month.