Crossover, Becoming the Strongest of the Era Starting with Jujutsu Kaisen

After transmigrating to the world of Jujutsu Kaisen, Shi Xia became a wooden cabinet with top-tier looks and family background, both rated double S, and bound herself to the world's strongest System. It let her make contracts with top fighters from other worlds and gain their powers. The good news: she could keep getting stronger by completing missions. The bad news: the System told her to fight Sukuna from the start. Her opponent was the strongest Jujutsu Sorcerer in history. Could she win? "I can win!" Shi Xia confidently declared victory. So what if he was the strongest Jujutsu Sorcerer in history? She had the mightiest beings from countless worlds standing behind her! "Seniors, lend me your power!" The girl closed her eyes and offered up a prayer to the gods. The ones who answered were: the oldest king of humanity, who had only one foot left; Mitakihara's strongest magical girl, who couldn't find her head; and the six-core Herrscher of the Void, who had lost five cores. "Wait, where did all these weirdos come from?"