"What's difficult is the video-call function. It requires runes such as presentation and projection. It's easy to achieve one by one. But since some unrelated runes need to be combined, it requires more advanced theory and technology."
"There's also the scanning function. It can be done by the scanning type of runes. The only difficulty is how to perfectly fuse these runes. If we can't solve this problem perfectly, the power of the runes will conflict with each other. Not only will it not work, but it will also hinder us. Then we can't realize any of the abilities. It will explode like a Rune Bomb."
Runes were a manifestation of the World Laws.
The fusion of different runes required in-depth analysis of other runes. Different combinations could achieve different functions, and not just any runes could be fused.
This required not only wisdom but also experience and time.
