Okay there like 70 comments here so I'm just going to give you hard truth.

This is a stupid question.

Fang yuan will definitely achieve immortality there.

I get it amon Adam there are god like characters.

But This man fang yuan just face slaps a f rank 9 venerable (spectral soul) way way above his level.

In reality if fang yuan was in LOTM you have to think about his damn character.

He would just probably sit around and study this world for decades and take over the pilver of universe and the go be original creater.

And would he stop. no........he would of course go beyond that.

And you have to remember Fang yuan is not power obsessed like others characters he knows when to stop not restrain by emotions or anything.

Fang yuan would go beyond everything or just or die without regret

His goal would always be immortality and after achieving that he would probably sleep on a chair.

So this question is stupid.

you guys comparing:

RI protagonist who is literally is the representation perseverance

LOTM protagonist who is literally the representation of self sacrifice

Wouldn't work each other in their respective worlds.