Our protagonist is a hillbilly from West Virginia that finds himself in the middle of a summoning between some Necromancers (heavily based and inspired on D&D5e) and a Great Old One. Hijinks ensue. He's genre-savvy about D&D but ignorant about the Xianxia/cultivation world he ends up falling into.
You can consider this a somewhat non-traditional Xianxia story, where the MC's "special advantage" that often exists (golden finger in the tropes of the genre) is being a patient low-level Wizard...