In Frieren's World, My Master Is Serie

[Growth] [Passionate] [Transmigration] [Decisive and Ruthless] [Lighthearted Comedy] [Healing] [Slow Burn] [Worldbuilding Expansion]

Transmigrated into the world of Frieren: Beyond Journey's End, he becomes the disciple of Serie, the great mage of the Mythic Age. He thought he was in for a dull century of arduous magical training, but then he unexpectedly awakens the [Miracle Codex System]!

By collecting rare spellbooks or killing demons, he can unlock blueprints for earthly wonders and heavy industrial structures. While Frieren is still wandering everywhere in search of a "spellbook that makes flower fields appear," the protagonist has already connected the entire continent with "mana-powered high-speed rail." When the remnants of the Demon King's army try to make a comeback, they'll be met by a "mana-powered floating city" blotting out the sky and planet-busting magic cannons!

"Master, times have changed." Looking at Serie, who is staring in stunned silence, the protagonist smiles faintly. "This is the ultimate magic that will change the world." And when the demon armies descend, the protagonist's heavy-industrial magical empire finally bares its fangs to this backward world...