I have multiple systems

What if the MC has multiple systems. Nitish who is a huge fan of eminence in shadow regretted him dying before watching the entire series. God has given me this choice so I chose 7 systems along with the power of cloning myself. But nothing is free in this accursed world. God has given me a mission to kill the demon king in the new world called Hyperion which has both magic and martial arts. And also God wanted me to give a good life to the God's Descendent as he had terrible fate. So let's welcome Nitish Adams in his new adventure towards becoming the world's strongest while maintaining low-key.