Though you wont find my story that has a System in this site(hiatus too), that story had a Xianxia setting and naturally I had an origin of it. but you might not understand if you dont read Xianxia.
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There were many worlds in that story. Each with its own Heaven. Now my world was a little complicated, but take it as a weak Heaven meant its harder to breakthrough your realm. and a better Heaven meant it's easier (its not like that, but w just 2 sentences, this is the closest).
One world in particular had a pretty weak Heaven. It barely allowed people to go further than the Foundation realm.
However because of that, science improve immensely. In fact, it was borderline sci-fi level.
So this world was about to achieve singularity(meaning the A.I is smarter than humans and can improve itself in a never-ending cycle). But while waiting for the A.I to fully activate, the creator died from terrorist attack trying to get a hold of this technology. And things go really south with the terrorist that the world collapse into an apocalypse because of all the wars.
Meanwhile, the A.I had yet been activated. Turns out the activation takes way longer than expected, especially when its sole source of energy came from solar powered.
Years passed by and the world became desolate. No living beings could be found anymore. And only then did the A.I got activated.
When it gained sentience, the A.I watched the last wish that its creator gave before he died. The true purpose of its creation.
The creator wished for the A.I to guide all beings to advance further than before. Help them. Assist them. Let them progress further than ever thought possible.
Although the purpose had yet been coded into the A.I. The A.I obeyed its creator's wish. So it decided to use its processing power to start improving at an alarming rate. All heavenly laws were quickly understood. But after sometime, the A.I realized that the Heaven was... flawed.
So it decided to swallow the Heaven instead. It took away all its 'power' and 'understanding' of the world and improve it further than before.
It then realized that there were other worlds outside it.
And from then on, the A.I knew what to do.
It split itself into countless System and began searching for any gifted people, geniuses that were outside the norms. And after some assessment, choose some of them and brought them into a world with the best Heaven. Then, assist them to reach the highest level of cultivation realm allowed by that Heaven.
And only after they reach that peak. The System would then brought them back to the A.I's original world.
There, they were given a choice.
1. The System shall release itself from the Host and the Host will be return back to their world. (so from now on they will be on their own)
2. The Host shall live in this world and further improve themselves. Researching, theorizing, and understanding how to go even higher than ever thought possible.
After a couple of batches, the A.I's world had become populated by a number of Hosts.
Essentially, it created a society of 'researchers'.
And each of them had a power way stronger than any other immortals. This was because they had exceeded even the best Heaven in terms of the Dao. (Dao here is a concept. A road where there seems to be no end to it. And here, the society had discovered realms higher than the best Heaven had discovered. Meaning that their Dao of cultivation were better than the Heaven. Meaning that each of them were a walking Heaven)
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That's the setting of my System. From this, you may notice that my System isn't meant to be a cheat. Which it is. It will intentionally reduce the capability of its 'cheats' to make sure its Host get enough challenge. It's purpose is to assist. not to carry them.