Power is what I need

It is a story of a boy got reincarnated in a different world after dying . he is born in royal family . keep low profile but every thing about him speak more than anything. got a system which is not a system but many system ( yeah many system) where one system can make someone good what will happen if one person got many system with each cheat powers watch our mc becoming most powerful god before he knows. creating a harem gor himself. getting more than what anyone wants. became someone whose power is on different level than others...,,,,.... And power is all he needs.