Fantasy World, My Profession Is Demon Ancestor

"It's just time travel, why a skeleton." No one heard Ron's voice, and he had no more time to care. Just because he turned himself into such a culprit, he was about to destroy his work. In a life-and-death crisis, in a place of chaos, order does not exist, justice is bleak, I don't know magic, I don't know swordsmanship, how can I save myself, I am the only one who can save myself. This is a story about practicing magic in a magical fantasy world. Sea of ​​Blood, Nirvana, Nine Netherworlds, Calamity Evil, Mental Delusion, Destruction, Origin... Endless demonic path to save all living beings, I, the demon, are merciful, and the demon loves the world.