Don't worry here is a small SPOILER if you are already in the 7th district ark. He will get a huge power up there in form of a new zombie evolution which has destroyed a whole district in the past and he will at the end of the ark get another two huge upgrades for himself in form of physical immunity and an OP skill which transforms on basis of his skills their level and in what world he is at moment of activation in. This skill gives him and his teammates additionally the power of ressurection when it's on.
noobageddon_:Really? Cuz i feel mc got nerf on district 7. And his level is stuck even though he can get a higher tier crystal from teir 5 mobs 75% of the time. lol