You Won't Believe It

In the underground area where the formation was, Rean gathered with the other Formation Masters and began to teach them about higher-level runes, principles, combinations, etc. From what he was doing, his objective was obvious. He wanted to obtain their trust, especially Vaz's. "Did you see? That's why the stacking of your formations has gone bad so far. The superposition of runes was creating incompatibility, and it still is right now. I'm truly impressed you made it work without it exploding."

Vaz was the first one to ask questions. "I understand the principle. However, it also requires materials hard to get our hands on in the Upside Down World. Is there a way to circumvent this issue?"