Kei Xun said to absorb the Invincible Apparition when it was at its weakest.
And that moment was when it was distracted while it was controlling the main body it inhabits.
Rex did exactly that.
Not only did he absorb the Invincible Apparition to pass the test and reach a state of disconnection, but he also accepted what the Invincible Apparition desperately wanted from him. It was a perfect unison that harmonized the disconnected state.
It was also said that the Invincible Apparition is the representation of a Scion's drive.
Anger, Happiness, Sadness, Fear, and Disgust are the acknowledged drives.
And there was no doubt that each one was born from an extreme moment experienced by the Scion.
Like Rex, most wanted to forget that extreme moment.
