Anger. It was an emotion that Sora was more familiar with than he would like to admit, and not just as the result of having so many hearts inside his own. But this was not anger. This was beyond anger, and yet it was not rage.
A single alien feeling built within Sora as the man in red came into view, and that feeling was hate. Vanitas's ire at a man who helped Xenanort. Ventus' anger at the fool whose actions allowed Terra to be further broken apart. The dull hurt of betrayal coming from the wounded heart with an intensity that was truly staggering with how faint her feelings seemed to be. Roxas's complete revulsion and anger at the thing that had taken away what life he had and utterly perverted his final days. Sora's own anger at the being that drove Riku to deform himself. All of it and so, so much more became a blazing inferno of hatred that could force a true Darkness to hesitate.
Sora ran ahead of Kairi, Riku, and the others, closing the gap between himself and where the king stood beside the fool that called itself Darkness in Zero. "Sora, the rest is up to you… and Roxas… I doubt you can hear me… I am sorry," DiZ said. Those words served only to stoke the fires of hate within both Sora and Roxas.
"Sorry you think sorry means anything after everything you did and everything you let happen!" Sora all but yelled, hands shaking and blood pounding in his ears. "Your words can't turn Riku back to normal or change the fact that you kidnaped Roxas! Your feelings won't drag worlds out of Darkness and put back the people!" DiZ only hung its head as Sora called the Kingdom Key to his hand, the force of his emotions and the emotions of those within him calling on primal Light, and a power only thought to be legend even in the age of fairytales.
Quick as lightning Sora drove his weapon into the red-clad thing, a glowing rift appearing at the point of contact. From the strength of Sora's hate and the gravity of DiZ's sin, the power of binding was unleashed to ravage the fool's body and Heart. "I don't know if Nobody's have Hearts…" Sora said, lying through his teeth, "but there is no question that you lack one." Sora twisted and extracted his Keyblade, causing the light to fade revealing no physical wound.
Riku and the king both looked to Sora in shock and horror as Kairi held an expression of grim resignation. A slow applause rang out as Xemnas strode towards the collection of warriors and kings.
"Only you would be foolish enough to meddle with my Kingdom Hearts, my old master. Truly… you look even more pathetic than the last time I saw you," spoke the superior of the inbetween. "And you Sora… I must say I am surprised. Few is the man who could excommunicate a Heart from all worlds touched by Light or Darkness. And to actually use such a power truly is unfitting of one chosen by the Keyblade." Xemnas finished.
Sora would have responded with how Xehanort had no right to say if something was fitting for a Keyblade user. But before getting the chance, Riku shoved Sora, Kairi, and the king down as DiZ's machine exploded into Light.