It could be that Shao Kahn somehow gets a hold of a powerful magical artifact from the Harry Potter world. This artifact gives him new powers and he starts to cause chaos in both universes. Harry Potter and his allies then have to team up with some of the heroes from Mortal Kombat to stop Shao Kahn. They'd need to combine spells and fighting skills to take on this powerful foe.
One way it could work is by having a magical portal open between the Harry Potter universe and Shao Kahn's realm. Harry and his friends could be accidentally transported there. Then they'd have to use their magic to survive in a world full of Outworld's warriors. Maybe they'd teach some of the magic to the good - hearted people in Outworld and in return learn some of their combat skills.
Chapter 693, "Is a Man's Prime That Short?", is the clearest early answer because it turns Sister's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Zhao Lang had never anticipated that the bravado he had shown earlier...
Chapter 530, "I Only Drink 80 Degree Tea!", is the clearest early answer because it turns Hua Country's situation into a concrete plot event. Early on, Old Sir Gu took a step back, his expression cold and guarded as he....
Chapter 683, "This is where you will be filming from now on!", is the clearest early answer because it turns Alright's situation into a concrete plot event.
If you want the clearest chapter reference, go to Chapter 13. Early on, Sensing that something was off with Jiang Yan, Jiang Yan dismissed the...; later, the chapter leans on What on earth do you mean?" Ignoring him once again, Jiang Li shifted her....
Chapter 884, "Master?!", is the clearest early answer because it turns Chang Song's situation into a concrete plot event. A useful checkpoint is the way the scene starts with I've heard this temple is quite magical, but why are there so many...
Chapter 566, "New Game Begins!", is the clearest early answer because it turns Chen Manman's situation into a concrete plot event. It opens with How is that possible?" Luo Xuan frowned, "What's the rush? and closes on I have a bad feeling about this.] [Wake up, when King Zheng speaks,....
Chapter 571, "Do You Know What Kind of Doctor is Standing in Front of You?", is the clearest early answer because the rescue effort creates visible on-page results.
Chapter 548, "A Guy Named Gu Yu", is the clearest early answer because it turns Jiang Cheng's situation into a concrete plot event.
Chapter 475, "Doting on the Man You Love to the Fullest", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with On the other side, Jiang Yan and Shang Shuyue also set off.
Chapter 665, "Give You a Good Lesson on Behalf of Your Mother!", is the clearest early answer because it turns Wen Feifei's situation into a concrete plot event. Early on, Why should I get so many points?. By the end, I just heard that you were also involved in the fight..