(Not a crossover anime/manga universe, but set in the Akatsuki/Akame ga Kill! universe) "Ichijo, I bestow upon you the Imperial Arm Murasame to commemorate your achievements." "No, too much killing intent, it will harm my health." "What about the Demon Possession?" "No, Lancer's luck is E, how many masters has this thing killed?" "Gaia Foundation?" "I don't want to be a cross-dresser!" "Then what do you want? Tell me, and I will grant it to you." "I want the Demon God Manifestation!" "But, this Imperial Arm is on Esdeath, if you want it, wouldn't you be taking Esdeath home with you?" "Your Majesty is wise, I thank Your Majesty for the marriage!"

Reborn into the Great Wu Dynasty, Li Changsheng becomes a (fake) eunuch in the imperial harem. He aspires to be like Lao Ai, but instead becomes the strongest eunuch on Earth.

In terms of political achievements, he established schools, implemented reforms, rectified official corruption, swept across the land, and brought peace to the world for generations to come!

He fought against powerful ministers, but in the end, he inexplicably became the most powerful minister and the most treacherous traitor!

When it comes to economic development, he transformed the once precarious Dawu into a prosperous and powerful nation, even surpassing Tao Zhugong!

In terms of talent, if all the talent in the world were equal to one bushel, he alone possessed twelve bushels, and the rest of the world would owe him two bushels!

A man of many talents, he wielded power over the world when awake, and rested his head on the lap of beauties when drunk. Princesses, imperial concubines, noble ladies, and chivalrous women all loved and admired him.

...

The stunningly beautiful empress later looked back and thought: "You dog of a man, I asked you to manage the harem, how could you have dug it all up?"

Mikael traveled through time and found himself in the Type-Moon world, a full two hundred years away from the Fourth Holy Grail War, a period he was more familiar with. As a Dead Apostle, he resolved to exploit his strengths and become the Type-Moon world's Tenlipo Sword Master, kicking the Suppressor with his feet and punching the Jeweled Man. Two centuries passed, and during this long period, he finally grasped the truth: being a Dead Apostle meant sleeping soundly, not daydreaming! … [Pure Type-Moon text, weak introduction. This book includes Mahou, FP Cangyin's Fragments, FGO 2.6 Prequel to the Demon Table (original), FZ, Sky Realm, FSN, El-Melloi II, FGO, and more. Other Type-Moon works may also be added.] [Due to the sheer volume and various variations, please forgive any omissions.]

The canonical version awakens as a vampire in "Highschool of the Dead." In "Parasyte," he fuses with Parasyte. In "Kabaneri of the Iron Fortress," he devours Kabane. In "Jiojio's Bizarre Adventure," he becomes the ultimate perfect creature. In "Akame ga Kill," he becomes a super-dangerous creature at the top of the food chain. In "Fate," he becomes the immortal evil of humanity, living from BC to the present day. In "One Punch Man," he becomes the God of Monsters and fights with the Bald Man in the Cape from Earth to Mars. —The devilish version of Saya Takagi: "Scum, devil, shameless, die!" Joseph Joestar (jiojio): "I treated you as a friend, but behind my back you want to be my dad!?" Tohsaka Rin: "What is your relationship with my mom?!" Illya: "Dad, after this Holy Grail War is over, let's go flower viewing together."

The chief eunuch Su Weisheng finally made it to retirement but died unexpectedly. When he opened his eyes again, he had become a five-year-old child a hundred years later, and all his enemies were dead!

Su Weisheng comforted himself that his elders were unkind and his parents were cowardly: at least I won’t become a eunuch in this life, so I can accept it!

I was competing for the best, busy with family finances, and taking the imperial examinations. Only when I became successful did I remember that I had forgotten one important thing - I can now marry and have children with a legitimate reason!

Urgent... Urgent...