Starting with being handed over to the Imperial Concubine, building a family with a thousand-year hi

[Fake eunuch + prosperous family + harem fantasy + Wei Wu's legacy + invincible system]
Su Mu transmigrated to the Great Xia Dynasty and was packed up by his own mother and sent to the palace to become a fake eunuch.
The reason is outrageous: the emperor's martial arts training has failed, and his cousin, the imperial concubine, urgently needs to borrow a sperm donor to have a child and compete for the position of crown prince!
"My son, the entire Su family's ancestors depended on your kidneys!"
Su Mu originally intended to play it safe and develop his strength, but who knew that as soon as he entered the palace, he was intercepted in public by the powerful Princess Li Qingge!
The princess is suffering from a cold poison and urgently needs a pure yang man as a medicinal ingredient.
At a critical moment, Su Mu awakened the [Strongest Family Prosperity System].
[Ding! Gained divine skill: One Shot, One Kill! 100% success rate!]
[Ding! Pure Yang Sacred Body activated! Become stronger by taking down enemies, plunder cultivation!]
After one night, the cold poison dissipated, and Su Mu directly entered the Grandmaster realm!
From then on, Su Mu thrived in the imperial harem.
Imperial Concubine Cousin: Cousin, isn't it my turn tonight?
Princess from the foreign land: Nonsense! Brother Su was clearly going to accompany me to admire the moon and eat rabbit tonight!
Years later, the emperor looked at his court of princes and grandsons and smiled as he passed away, saying, "I have a worthy successor!"