Jake became pensive upon hearing these words. That they had within them an Aether Code that intrinsically differentiated them from Digestors and other Mirror Universes was not surprising. If the Corruption of Digestors could not be purged by the Oracle, it was because the compression level of its Aether Code, or in other words, its Grade, was unfortunately higher than that of the inhabitants of the Mirror Universe.
His master Cekt had once mentioned that a Wilderth, the creature with the most powerful bloodline recorded, namely Grade 17, was supposedly capable of resisting this influence, but that did not mean it was unaffected.
And then it was one thing to increase the Grade of an individual's bloodline, but it was a whole different ball game to increase the Grade of the Aetheric signature of the entire Mirror Universe.