Honkai: Star Rail: Starting Out as a Four-Core Herrscher

[No pairing + no System + transmigration + not overpowered + hot-blooded (maybe)]

After an accident, I transmigrated into... a railway? What kind of novel plot is this? Yi Cheng could only complain inwardly.

I transmigrated without a System to help me. How am I supposed to survive? All I got was a high-definition status screen?

Wait, no, I also got a Flame-Chasing Greatsword. Doesn't that make me invincible?

No, the Herrscher Core's powers still need to be unlocked.

That works too?!

(I can't write a good blurb. Read the story for details!)