His name is Eren, as mentioned in the first chapter. But the character he possessed is called Elder Ren, or Ren, as first mentioned in the third chapter with Disciples calling him Elder Ren, since the people of this world don't know he is not that person anymore. Elder Ren, and Eren are the same person, so their names will sometimes be changed, depending on whose perspective he is being mentioned. Although I already mentioned it in a reply, I thought it's better to reply here as well. Anyway, thanks for the review.

Eren is his real name, which he had on earth. Ren or Elder Ren is what the people of this world know him as, because it's the character's name. So when it's from the Character's perspective, it is mentioned as Ren.

Eren is his real world name, Ren is his novel name.

Might, if there are more readers. For now, I don't think anyone would join.

They were deleted, and the arc will start in a different way.

In the previously released version, the rewards for 2nd and 3rd were switched. Has been corrected.

I think I forgot to clarify that part. He is talking about raw strength here. With increasing cultivation, body characteristics change. The body at the core becomes stronger. If cultivation is sealed, the increased raw strength, muscles, strengthened bones and other stats still remain.

Not yet

In the novel that Eren read, he didn't. But in the novel, he also didn't have the main mission to kill Elder Ren. Or MC would have known. It was hinted that some things had changed with the MC, but not outright fed to leave readers something to guess.

Chapter 10,4th paragraph. It was mentioned "The Devil Sect was the only sect in this region after all. Every other sect here had been destroyed by the Devil Sect. If one wanted to join any other sect, they had to travel to other provinces, and the journey itself was expensive and long. ” I think you misunderstood something. Other provinces don't mean other continents.

Typing error. I'll correct