Rui now had a unique perspective as a Martial Squire decently knowledgeable on esoteric material science. Furthermore, his background in physics also enabled him to gain a far better understanding of the ways that esoteric substances and materials could be applied in technology.
All he could say was that he now truly understood how esoteric military technology was able to keep up with Martial Art, even if just barely. These esoteric substances were capable of some truly astonishing things, and if applied and engineered properly, could provide great results.
Furthermore, these were just ordinary esoteric substances and alloys, he couldn't even imagine what the high-grade esoteric substances were capable of.
For instance, he wouldn't be surprised if there were esoteric substances out there that had the power to annihilate mountains, or perhaps even more.
