Need help finding a specific story.

For the last year this channel has shown me some of the greatest stories that have ever come about in D&D and the time I have spent so far has been worth it. But despite the treasure trove of lols, trolls, and epic stories, there is one story I have been searching for for the last few months that seems to be impossible to hunt down. I was wondering if any of you guys might be able to discern its location.

The story is about a guy who had a solo campaign with his DM and played a max level (if not almost max) wizard. Various shenanigans in the story revolved around the city that he had control over. Such things included killing dragons and stealing their hordes to refresh his economy if they were not doing well, fortifying the city with various wall spells, and training his own army into the D&D equivalent of the spartan army. The main enemy of his country turned out to be a beholder mage.

If any of you guys know where this story is then please let me know.