Play the Nobel Prize
On the way home from school, Ling Xiaowen had been a hero and taught three bad kids a lesson for bullying a " dwarf." In order to repay Ling Xiaowen's kindness, the " dwarf " secretly followed Ling Xiaowen and gave him a " Universal God Ball."
It turned out that this " dwarf " was the grandson of the famous great inventor, Tesla, a hundred years ago. When Tesla passed away, aliens stole his brain cells, revived him with high-tech means to serve them, and strictly guarded him from leaving the country. However, he was still concerned about Earth, so he asked his grandson to secretly " descend " to give his treasure to a " good person " on Earth, hoping that he would understand the truth while " playing " and contribute to the advancement of human science and technology.
This " God Ball " was known as the Lightning Fireball by the people on Earth. It was a mysterious product of nature. Other than Tesla, no one could successfully make it.
From then on, Ling Xiaowen and the God Ball were inseparable. They " played " with the fun of their teenage years and the wonderful and unimaginable stories of their growth.
I'm loving this it's completely different in regards to it being a MCU and PJO crossover world. But in the earlier chapter where the author explains the time-line could you also add a bit to do with the x-men as I've posted a comment to do with me not understanding the x-men time-line as laura(X-23) has already been born/created but Charles Xavier and Magnito are still working together like in x-men first class.