Ash decides to cooperate with Xiao in order to thwart Luther's ambitions. After Ash is shown remnants of Luther's experiments, Xiao tells him about Luther's goals and explains how Xion is the key.
It's not my fault. I can't help that it's cruel.
Was soll ich denn machen?
Ich tu's ja nicht, weil ich es will.
J’y peux rien…
et c’est pas mon intention.