Alcoholic_Panda
The MC could create the infinite magic of the max level solo manhwa, but instead of being infinite he would just recreate the fusion of elements by copying nuclear fusion, since infinite is too much. To create this magic he should use science because with imagination there would be a risk of him exploding, I don't want to see the MC be a second Doctor Octopus
The mc could create the magical equipment from the anime Mahouka Koukou no Rettousei along with magic circuits, they would be great for Merlinda who is not a witch, but they should not be dependent on the Mahouka Koukou no Rettousei equipment and just continue training normally. mc could create a magic potion that is like blood to recruit vampires, and would serve as a poison, also hardening the blood in the veins of those who are injected in excess depending on the physiology of the supernatural person. There is that tribe of cats from the underworld that if the MC saves he will have a connection with the yokai