Reincarnated Into A World Of Elves As The Only Man - Chapter 8: watchful sister

Tang Long was brought to the Immortal Cultivation World by an immortal who noticed his affinity to wood and cultivation.
Relying on his amazing talent, became one of the five emperors of that world.
He failed his Heavenly Tribulation and had his soul scattered into pieces but one part found its way to Qin Haodong on Earth.
With his excellent medical skills, he became a divine doctor of traditional Chinese medicine and encountered the baby girl he made before going into the Cultivation World, whose mother was as pretty as a fairy. The little girl even asked him to find more lovers. What a cute girl…

The Yanhuang Ancient Domain, vast without end, gave birth to many Celestials and Demons of antiquity tore Heaven and Earth apart and surpassed the control of the 3 Realms and 5 Elements over the endless years it has existed. Numerous Gods, more than ten thousand races, and humans born with a God class body have also come out from the Domain, traveling through the nether, warping Yin and Yang, omnipotent.

Betrayed by his sister. Betrayed by chosen one's humanity. Betrayed by the Gods.That was how the life of Leonard, the Defier of Fate and the world’s greatest heretic, came to an end.When demons invaded human lands, he received a revelation from the Goddess. She commanded him to act as a spy, to infiltrate the enemy ranks and expose their secrets for humanity’s sake.To fulfill this mission, he had to sacrifice a part of his soul. He accepted a demonic contract, surrendered his soul, and became a demonic human. Risking everything, he provided critical information to the humans and helped them turn the tide of battle.But then, he had a shocking discovery.The war was nothing but a gambit between various gods and before he could act, the war was stopped out of nowhere.In an unexpected turn, humans and demons put aside their hatred and signed a peace treaty.Before Leonard could make sense of it, he was betrayed. Both demons and humans joined hands to kill him.“Fuck! If there is a next life, I swear I will tear you gods apart!”With this scream, he thought his suffering was finally over.But…When he opened his eyes again, he found himself in the body of Kael Veydrin, the son of the Grand Duke of the Heizen Empire. But this new life was no different from the last.His sister wanted to get rid of him.Born with clogged vessels and no talent, he was nothing but a disappointment.A subject of fun and ridicule among the fellow nobles.Despite rebirth, nothing seems to change.The cursed fate.The distorted history smearing his name.A world that was against him.Leonard, now assuming the identity of Kael, let out a low chuckle.“Don’t worry, Kael. I will have revenge for both of us.”“They called me heretic right? I will show them how a true fucking heretic acts.”Follow Kael's journey, as he fights against the fates and injustices to drag the ones ruling above.

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?

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