Overpowered Archmage Doesn't Hide His Talent - Chapter 16: Ill see you later

Qin Fen had once been abandoned and broken until, one day, he picked up a liquid metal ball that turned his life upside down.
This is the interplanetary era where Classical and Modern Wushu are competing. Classical Wushu enables followers to grow as powerful as dragons and elephants, whereas Modern Wushu enables followers to freeze monsters or even extinguish erupting volcanoes.
Qin Fen steps onto the stage of both Classical and Modern Wushu while belonging to neither. With the exquisite combination of both Classical Wushu and modern technology, he will pave a way to become a legend.
He is one of a kind, a favored son of heaven.

In a modern world, a professional assassin was murdered by her beloved and found herself revived in an ancient world as a general’s daughter with a weak physique. She was engaged to a prince, but because she did not have a nice appearance, her fiancé and sister attempted to kill her. Although she had to struggle to survive, there were also those who unconditionally loves her that supported her in her time of need.

--WSA 2025 ENTRY--Neraxis saved the people and wiped out the monsters, but instead of cheers, he faced silence and a glowing blue text:[Task Failed Successfully!][Rating Generated: SSS-Rank]“The hell does that even mean?” he muttered, finding the situation a bit strange.Before he could process, the so-called heroes—who had hidden while he fought—emerged. He waited for gratitude, only to feel a dagger pierce his back.The only girl he loved stood behind him.She betrayed him.The crowd and heroes? They were staring at him with disdain and contempt.“You...” he groaned as a spear and sword headed for him, ending his life.But instead of dying, he was sent back to the past—specifically, to the first day of the academy, year 2367, 8 years before his death.However, many things had changed. One of the most significant was the sudden appearance of a Tower, a mysterious structure that had appeared across all the continents, granting power to those brave enough to contest its challenges.“Not again... With this chance I will end you all” Neraxis vowed to himself, embarking on his path of revenge, while also trying to give his life new meaning.

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?

- Description from novelbuddy