Marvel: Eren Yeager

What happens if a die-hard fan of "Attack On Titan" get reincarnated in the famous and yet dangerous Marvel Universe?. Ziyao Chen is that said person, not only did he transmigrate in the Marvel Universe he's inside the body of he's favourite Character, the protagonist and also the one and main that became the antagonist. "Eren Yeager". He was given a system called the "Titan System" which allows him to create titans and transform into one.