Warhammer 40K: I am the Astra Militarum

[First-time author here—fair warning, the opening’s rough, but it gets better!]

After accidentally transmigrating into the grimdark universe of Warhammer 40K, Lin Fan discovers he possesses an uncanny ability. Under its influence:

The Necrons, slayers of the Old Ones and extinguishers of stars, find themselves powerless against him—dubbing him "The Subjective One."

Slaanesh writhes in frustration, unable to corrupt him.

Tzeentch, seeing Lin Fan as an existential threat, weaves endless schemes to save itself from annihilation.

On the eve of Abaddon the Despoiler’s 13th Black Crusade, the galaxy burns with unrelenting war. Amidst escalating battles and unbearable casualties, Lin Fan realizes... (to be continued)