Eater Blade: Grinding in Apocalypse - Chapter 39: INTO THE QUEEN’S NEST.

Rejected at birth for lacking Ka, the divine essence that flows through all living beings, Alioth seemed cursed from the very beginning of his new life.When the heavenly kingdom of the gods collapsed, the world was consumed by Azoth: an abyssal fog that mutates every living thing it touches.Humanity's last refuge became Caelestia, a colossal floating citadel built amid the ruins of the gods' former home.Here, lineage is everything. Those who possess superior Ka can demand absolute obedience from the weak. Without it, one becomes fragile and unable to wield magic.But Alioth harbors a hidden gift, born from his past life: the power to bestow names drawn from the myths of his old world.Zeus, Odin, Excalibur, Gáe Bolg. Everything he names acquires the legendary traits of its mythical counterpart.But will this power be enough to survive and decipher the mysteries of this world?Alioth doesn't know yet, but he's determined not to waste his second chance.

Once through the pirates, Lu En became the son of Monkey d Dragon, a grandfather named Monkey d Karp, and an unreliable and neurotic younger brother named Luffy.

Fortunately, the ghost back system is activated!

The completion of the ghost back is 10%, and the training effect is increased by 100 times!

The completion of the ghost back is 20%, and the training effect is increased by 1000 times!

…

One day, Lu En, a ghost-backed master, appeared in front of Luffy who was shouting to go to sea, and made Luffy cry on the spot.

Luffy: “The pirates in the sea are all monsters like my brother? I don’t want to go out to sea!”

Garp: “For a long time, the two boys, Long and Luffy, with small arms and calves, I really doubt that they are not my sons and grandsons. Like Lu En, they are the grandsons of the old man!”

Warring States: “The strongest creature in the sea, land and air is Kaido? No, it’s Lu En!”

- Description from novelbuddy

A man who was once called the world’s strongest agent ended up becoming a teacher after his retirement, to train a new generation of agents. After many years of training his disciples, he was killed at the age of 60 by a secret organization’s ruse and was reincarnated in another world with his memories intact. Though he was surprised by the existence of magic and the strange species in that world, he quickly adapted to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his rigorous discipline, in order to reach his goal: Resume his career as a teacher which he left halfway through in his previous life. This is the story of a man, who, based on the memories and the experiences of his previous life, became a teacher who travels through the world with his students.

Before being reborn, she made a fuss every day, only wanting a divorce, divorce, and another divorce, until she was in danger and he died to save her.After rebirth, she was overjoyed, only wanting to love him, love him, and love him dearly.However, someone is too aloof. What to do? No problem, she is prepared with eighteen different skills, not to mention she has a 'fox' strategist.Thus, she deals with scumbags with one hand and flirts with him with the other, leading to happy days that bloom like flowers.“Report, someone confessed to sister-in-law.”“What? Someone dares to take Mu Qiancheng's wife? Bring that blind fellow to me, I want to have a good chat with him about life.”