Infinite War Machines: My System Is a Shape-Shifting Cutie

[Sci-fi, near-apocalypse] + [pseudo-infinite-flow] + [tests and challenges] + [smart characters] + [no harem] + [with a System] + [battle vehicle upgrades] + [not a power fantasy]

Technology collapsed completely a thousand years ago, causing a disaster that has lasted for a millennium.

Even a thousand years later, most people can barely get by.

In the post-apocalyptic wasteland, a Martial Emperor afflicted by a genetic disease chose the wrong path.

When faced with the tests of Infinite City, should he seize the opportunity or struggle to survive by any means?

Perhaps everything is real, and this is only a test.

I’m not good at writing summaries, so please head to the main story.