One anonymous tip-off.
That’s all it took.
Ling Ke—a random guy from our world, isekai’d straight into the countdown to the Third Honkai Impact—got snatched off the street and spent the next several years as a living test subject. Cut open, stitched back together, broken, rebuilt, screamed until his voice gave out.
While he rotted in a lab:

Fu Hua, the Immortal Red Kite, ascended beyond the red dust of mortality.
Kiana joined Anti-Entropy.
Raiden Mei pledged herself to World Serpent.
Bronya finally found Seele again.

And Ling Ke?
He came back wrong.
The Herrscher of Dominion.
Master of a thousand puppet bodies.
A walking apocalypse wearing a human face.
“From this second on…
this world burns.”
The fully blackened transmigrator smiles—a jagged, ugly thing that doesn’t reach his hollowed eyes.
Honkai.
This is my revenge.

Chapter 90 - power stones mission update.