[Who said that the materials cannot be found in this world? They are there and they are so much abundant and cheap. It is just that you have never seen them before.]
Jack: "…."
Jack couldn't understand what the system was trying to imply. They are there? And furthermore, they are abundant and cheap as well?
If that was the case, then how come he had never heard of them? He was sure that if any of them was present, he should have at least heard about it.
[Just like how you didn't know about the existence of the strongholds not long ago, that is just how you don't know about the existence of these materials.]
Jack remained silent as he tried contemplating on what the system was meaning. Even though he really wanted to argue with the system, there was nothing he could say about it.
