Welcome to the Man-Eating Dungeon - Finale: To the End of the Labyrinth

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?

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

When Logan and his classmates are suddenly transported to a world teetering on the brink of destruction, they find themselves thrust into a desperate battle against a relentless demon invasion. In this new realm of magic and peril, each student discovers unique powers to aid humanity's fight for survival. However, Logan's ability to tame creatures is deemed the weakest among his peers, earning him scorn and ridicule.Despite the doubts of those around him, Logan's determination never wavers. As he bonds with mystical beasts and uncovers their hidden strengths, he begins to realize that his power might be the key to turning the tide of war. With every creature he tames, Logan grows stronger, proving that true strength lies not in raw power but in the heart and courage to stand against overwhelming odds.Logan's journey is not just about battling demons; it's also a personal struggle against his own loner personality. Having always been an outsider, Logan must learn to trust and connect with others, both human and beast. His solitary nature is challenged as he forms unlikely friendships and alliances, discovering that unity and cooperation are essential in the fight for survival.

Collection of short stories.

- Description from Novelupdates