@Kuraiaku : While I criticize this arc, I'll not drop the manhwa. And you talk about "build up" but for the moment the chapters don't build anything. Waiting =/= build-up, a correct build-up is about preparing before the grand event, or an increasing tension toward a dreaded problem.
Thing is, the MC (and pram) doesn't really prepare. They try to prepare but without success, they just wait that something happens and because they (and we) didn't know what will happen and when it'll happen we don't had any increasing tension.
So no tension and no preparation != build-up.
Now, things seem to change with the last image of this chapter. We finally see the problem and we have a count-down. But if the characters keep waiting aimlessly to magically find help it'll stay bad.
I must add that I'm just a little burned out because of all the build-up with Adjest. Since the very beginning of the manga, we got an amazing build-up on her usefulness and how she must joining MC's side. We got a show on her prowess, on all the difficulties they had to pass before she gets with the MC (because of her statue and the professor and Mc's companion who are against her joining MC's side), on all the difficulties where the MC need her (to get a full team, to get her power for later). All of that linked with her training with MC before officially joining his side... And when she finally got to join MC's side, when we finally got to the conclusion of this 50 chapter build-up... we got nothing... nothing and we just pass on another thing... So yeah, a half-assed build up like we got with the last 4 chapters is not good enough. It's really hard to create another build-up when you have one that is far more advanced.
Maybe if we got a real conclusion with Adjest I would appreciate better these last chapters... But beginning a new arc when the last one isn't finished? I don't really like it.