"You mean... it was purely a difference in air pressure?"
What kind of joke was that? It wasn't like Kevin had never climbed a mountain. He knew what air pressure was. How could it possibly create such terrifying cutting force?
"Because that was not natural wind pressure, Kevin." Mei's voice was calm and clear. "They were two carefully controlled Ideal Airflows that triggered a microscopic contraction effect in localized space under specific conditions."
Kevin's head hurt even more. What was all this supposed to mean?!
Besides, he himself possessed the Key of the Void, yet he had never displayed anything nearly this powerful.
"You can understand it this way—" Mei patiently explained, trying to make it more intuitive.
"When an area is evacuated into an almost perfect vacuum, while two extremely compressed Ideal Airflows with completely opposing properties close in from both sides."
"At the instant the vacuum state is canceled, space itself develops an extremely brief microscopic tendency to 'collapse' inward due to the enormous pressure imbalance."
"On a macroscopic scale, that collapse becomes incomparable cutting power—it does not cut matter, but something more like the structure of space itself."
As Mei explained, the good news was that Kevin was not some muscle-bound brute this time, and Mei did not have much autonomy either. Their relationship was pretty good this time around.
Still, whenever Kevin saw Mei, his heart tightened a little. After all, he still had not managed to appease Mei in reality.
"Then how should I deal with it?"
"Objectively speaking, I think this is much easier to handle than the Thunder Herrscher. The conditions to trigger the killing blow are a vacuum environment, two Ideal Airflows, and then the cancellation of the vacuum."
The windup for that skill was ridiculously long. Thinking of that, Mei sometimes