(Modify later) "Upgrading to Rank-A, I suppose the situation in this zone is even more dangerous than before," Xu Huo said. "Ever since you all came in, you haven't encountered any full-zone plant revival. It's been seven days now. Your records are clear—along the way, there were no signs of large-scale plant damage, and even if mutant plants grow rapidly, those old trees reaching tens of meters to hundreds of meters in diameter couldn't possibly be repaired in just a couple of days, so it seems some time has passed since the last full-zone wave."
"If the upgrade isn't due to the shortened interval between full-zone waves, then possibly the waves have become larger in scale and last longer."
"Or perhaps there's a peculiar variant among the mutant plants that can cause large-scale damage instantly. If that's the case, the timing of full-zone waves might become unstable."
