It's Too Hard for the Prince to Seize the Legitimate Son, so I'll Just Force Him into the Palace

Qin Yuan traveled through time and became the most useless ninth prince in the Great Xia Dynasty. He was born with a useless body, his mother was poisoned in the fetus, and he was bullied all the time. On my eighteenth birthday, when I was trampled and humiliated by my brothers, I activated the [Eternal Emperor Sign-in System]! Bite! The novice gift package is open. Congratulations to the host for gaining five hundred years of cultivation and stepping into the realm of heaven and humanity! [Ding! Congratulations to the host for obtaining the god-level summoning card. Sword Master Gai Nie and Jin Yiwei are here to report! From then on, Qin Yuan's road became easy and "easy"! The prince is hypocritical? I slapped it on the wall and couldn't even pick it off! The prince is tyrannical? Punch through the chest and let you know what cruelty is! The courtiers are dissatisfied? A one-day tour of Jinyiwei Prison, guaranteeing your loyalty! Father: "Son, you want to rebel?" Behind Qin Yuan, Sword Master Gai Nie's sword aura surged into the sky, and his hundred thousand cavalry were filled with murderous aura. "No, I'm not rebelling." Qin Yuan smiled calmly: "I'm just here to take back everything that belongs to me. From today on, I have the final say in this world!"