What do dungeons do in times of peace?

Hundreds of years after the Pact of Three, the world is enjoying a time of extended peace between Dungeons, Dark Lords, and the Mortal Races. In a remote valley, two dungeons - Kandra and Calith - spawn, but they belong to different factions of Dungeon Cores. Factions that have an ancient enmity. Before the Pact of Three, they would have sought to destroy each other.

Now, however, Dungeons compete in other ways.

Kandra and Calith have no great evils to defeat and no world ending problems to solve. Instead, what they have is a competition to prove which one of them is the best - and with the Guild assessor on his way to grade them, they are going to have to work hard and fast to impress adventurers, get good ratings, create interesting bosses, and try to provide balanced encounters. Working through the Dungeon Mesh, they'll have access to the vast knowledge of their factions to aid them - but the only way to win is to give the assessor something he's never seen before.

It doesn't help that both find the other one equal parts frustrating and fascinating. The Dungeon Next Door is a Dungeon Core Slice of Life that contains light LitRPG and cultivation elements, magitech devices, killer squirrels, dungeons reading their reviews, and so much more. [participant in the Royal Road Writathon challenge]