HxH: God of Choice System - Chapter 67: Chrollo’s Invitation

Four years ago, she was an abandoned heiress casually thrown away by her family.Four years later, she became a big shot with countless honors and huge power.When she returned to her country with her babies, a man was already waiting for her at the airport, “You disappeared for four years after giving birth to my child. I will never let you run away again.”……Her triplet babies are extremely talented.Eldest, “Who dare bully our mommy? I'll hack their information and broadcast their scandals globally!”Second, “I'll make a call to immediately impose a restraining order and freeze their assets!”Youngest smiled at his two brothers, “Brothers, no need to bother! I just mention our daddy's name, and they've come to the building begging for forgiveness.”

More than ten years later, this sentence gradually spread in Elbaf Continent:

Never use magic to deal with tyrants, because you will find that he will return your spells to you thousands of times after being strengthened by countless magic specialties.

This is the story of a dragon-shaped self-propelled fort that keeps doing things in another world.

There is nothing that one magic can’t fix. If there is, then there are more. ——Izawa

- Description from novelbuddy

Rin was a nobody—just a gamer with a love for manga—until death dragged him into another world.Reborn as Auren, the third prince of the cruel and war-hungry King Aurelus of Austerra, he enters a realm ruled by magic and divine systems. Every person is born with a Divine Frame—a gift that defines their class, power, and fate.Everyone… except him.Frameless. Powerless. Disposable. Auren is cast aside as a mistake that shouldn't exist. But hidden beneath that flaw is a terrifying truth: no Frame means no limits. With nothing holding him back, he begins mastering all paths—mage, warrior, healer, assassin—enhancing them with Earth’s forgotten science.In a world that thrives on order, Auren is chaos. And from that chaos, a legend is born.

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?