Marvel: Mission System

This fanfic is about a young guy who became a transmigrator but later fought the transmigrator who is ambitious enough to cover the world which he didn't like to protect his family and to avoid the destruction of the Main character of MCU and change some plots. ======= The new author kindly gives me some suggestions and if you see a mistake just comment to fix it. P.s English is a second language and knows some basic grammar.