Royal Sister's Marriage? I'll Show It Off Immediately

My name is Xue Ziyue, and I am a reborn person. In my previous life, I had reached the realm of the Great Emperor. When I was about to break through to the Immortal Realm, I was destroyed by my sworn enemy and my body disappeared... Becoming an immortal became just a dream. Fortunately, God has given me another chance. This time, I plan to kill my enemy first and solve the biggest obstacle to becoming an immortal in my previous life! The strange thing is, why did this nemesis suddenly change in this life... Is this the butterfly effect brought about by my rebirth? … My name is Ye Chaoge, and I am a time traveler. I don't have much interest in other worlds. I just want to spend this life leisurely, so I failed, and then... Inexplicably became a useless prince? I don't know which species of cubs are spreading the news. But no one knows that I am still a hanger with a sign-in system. Twelve years have passed and I have power in nine states of the Kyushu Continent, and I am already an imperial realm expert. It can be regarded as one of the group of people standing at the top of the Kyushu Continent. Suddenly one day, my carefree life was broken. My imperial sister was inexplicably sent to marry the crown prince of the Tianjian Emperor... "It doesn't matter, I will take action! Just in time, the name Tianquan Palace will appear on the Kyushu Continent."