The Maniacal General with his Crazy System

A man was rescued by a System who would let him do anything he pleases. The System would give the man strength that would be reckoned with and the System would do anything to protect him. But the man himself isn’t normal, even with no memories, he could feel it, he was on the breaking point of being maniacal. What could be worse than a maniacal man with his crazy system roaming around the universe? EXTRA NOTE; MC is crazy. Don't go running around saying that a normal man wouldn't do stuff which the mc is doing in my fanfic. Note 1; I do not own the picture which I found somewhere on pinterest. Note 2; I do not own any of the original works which has been created by others. Note 3; I do only own the original characters which I will make from time to time.