Yes, in the novel I Am the Ruler of All Ages, the protagonist returned to Earth after cultivating for ten thousand years and found that many of his descendants had become the number one people in the Divine Continent. I highly recommend this fantasy novel to you. The plot is compact and exciting, and the characters are vivid. I believe you will definitely fall in love with it. I hope you like my recommendation. Muah ~
Maybe Natsu comes back with new powers. He might have to face old enemies that have grown stronger in his absence. Also, his relationships with his friends could have changed, and he'd have to work on rebuilding those bonds.
The plot of this novel could center around the great mage's return after 4000 years. When he comes back, he might find that the place he once knew is almost unrecognizable. His return could be a catalyst for many events. He may have to use his ancient magic to deal with modern - day problems. There could be a mystery about why he disappeared in the first place and what led to his return. He may also have to face the consequences of the passage of time, like the decay of old magic sites or the rise of new dark forces that he has to combat with his age - old wisdom and power.
I'm not sure specifically as I haven't read it in detail. But generally, it might be about a great mage coming back after a long period of 4000 years, perhaps to a world that has changed a great deal and facing new challenges, enemies or reuniting with old comrades.
I recommend "The Return of the Reborn Sword God" to you. The male protagonist transmigrated to the world of sword immortals and became a peerless sword god. However, he was pushed off a cliff and returned to Earth. Many years later, he returned to the urban cultivation world. I hope you will like this novel. Muah ~
Well, we know the great mage is a main character. There could be a young apprentice - type character who discovers the mage upon his return and becomes his follower or ally. Maybe there are powerful wizards or sorcerers who are now in control of the magical world in the mage's absence and see him as a threat or an opportunity. There could also be some non - magical characters, like a king or a peasant, who get caught up in the events following the mage's return.
You might start by looking at bestseller lists in the genre related to the manhwa. Or, check out novels by authors who have a similar writing style or approach to storytelling as the manhwa creator. Another idea is to browse reviews on book websites to find novels that match your preferences based on the manhwa.