Manga by author Necoco - Status ongoing

After Dean, a third rate adventurer, got surrounded by demonic beasts in the demonic labyrinth, he fled to a place where he found the strongest demon who devours power: The demon-fed sword Belzera, born to the Gluttony Empress Belzebuth. After obtaining such unexpected power, he once again aims to become a first rate adventurer he looked up to, and delves deeper into the labyrinth. However...

I, who should have died after being hit by a car, was born again in another world. However, I was born in a shady minor family that used magic and controlled wooden puppets called the Marren Clan. Possessing a strong interest in magic since my previous life, I spend my time zealously studying magic to the point where even the people in the vicinity draw back. One day, I heard I was to be married to my little sister when I turned 16 in accordance with the traditions of the Marren Clan and decided to flee to the city. For now, since I have the strongest magic, I guess I should idle around making only enough money so that I don't have to work for my whole life.

Lambert, one of the great generals from Regios kingdom, was suspected of planning a rebellion against his lord at the end of the unification war, and as a result, he died an unnatural death.Two hundred years later, when the era had changed and the Regios kingdom had entered its peaceful era, he was accidentally revived as a demon called Undead Knight Lambert, whose entire body was wrapped in a flashy Demon Metal Organ.So Lambert set out on a journey to punish the wrongdoers while enjoying the peaceful sight of Regios kingdom. But this peaceful era was basically an easy mode for Lambert, the greatest general of the chaotic era.

I, who should have died after being hit by a car, was born again in another world. However, I was born in a shady minor family that used magic and controlled wooden puppets called the Marren Clan. Possessing a strong interest in magic since my previous life, I spend my time zealously studying magic to the point where even the people in the vicinity draw back. One day, I heard I was to be married to my little sister when I turned 16 in accordance with the traditions of the Marren Clan and decided to flee to the city. For now, since I have the strongest magic, I guess I should idle around making only enough money so that I don't have to work for my whole life.