Warhammer 40K Starts from the Archives

My name is Erath, an unknown clerk in the Archives Bureau at the bottom of the hive city. My job is to archive the "unnecessary" history of the empire and burn the names that "should not exist". Until I discovered that the history of the empire was a tampered book—the martyrs were erased, the butchers were whitewashed, and the blackened truth were all hidden in the cracks of the banned book. They said that fate was determined by the God-Emperor and written by the Four Gods of Chaos. I don't believe it. I use a pen to re-write the erased name and change the tampered history back to its original state. The Inquisition labeled me a heretic and wanted me to be burned at the stake? Sorry, your judge has been written into the death ending by me. The Lord of Changes, Tzeentch, is spying on my manuscript and wants to use my pen to write about the ever-changing destiny? Sorry, not even God can change my script. They call me a heretic, they call me a fateweaver. And I want to rewrite the ending for this decadent empire.