Genshin Impact: Building a Demon Lord's Castle with the Monster Mutual Aid Society

Su Xin arrived in the world of Genshin Impact, joined the Original Monsters Mutual Aid Society, and activated the Original Monster Training System. Signing a contract with an original monster unlocked its training!

Slimes resistant to every element, Hilichurls skilled in swordsmanship, Ruin Guards equipped with floating cannons, Electro Cicin Mages who opened with high-level magic, and even the god Beisht, trained and evolved into a dragon girl who could summon wind and rain...

As these outrageously powerful, anomalous creatures began appearing, Teyvat gained one urban legend after another...

From then on, peaceful Teyvat's whole vibe went off the rails.

"Damn it, where did this weird Hilichurl come from? It can actually wield flying swords?!"

"Can't even beat a Slime. We've fallen on hard times, folks."

"Watch out! It's a Whopperflower! Wait, holy crap, it's the Pyro Regisvine Queen!"

"Oh no! The Dvalin from the Demon King's castle is charging over!"

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.