Warhammer 40K: Look Again and I'll Ruin Your Reputation

Warhammer 40K is one of the worlds no transmigrator would ever want to end up in. Then one day, a warp entity with a modern soul appears in this world, infamous as a giant cesspit, bringing a little something different to its grim reality. Except... What do you mean, you installed a speaker on the Golden Throne so the entire Imperium can hear the Emperor's holy profanity? And what do you mean, you produced a child between Roboute Guilliman, Imperial Regent, and Yvraine, leader of the Aeldari Reaper Army? The two of them are completely losing it, while everyone around them is shouting, "What a blessed grandson of the Emperor!" And then there's how you turned an ordinary Imperial citizen into a Blade Queen specialized in countering the Tyranids? And also seduced a female Necron Overlord? You pieced Sanguinius back together, then accidentally assembled him as a woman? How careless can you be! Heretic, what other schemes are you hiding? The culprit, finally caught by the Inquisitor, steps forward and says, "Oh, don't all look at me like that. You're making me blush... Next, I'm going to broadcast the secret little stories of the original Astartes Legions to the whole galaxy!" "No!!!!!"