A certain someone knew the extent of Skyward Sword's power, and it was none other than Dark Emperor.
The reason was simple... he wielded Skyward Sword's counterpart—Terra Blade.
Nobody knew more than Dark Emperor about the power of Skyward Sword. It was sharp enough to cut through the walls of Prison of Darkness. That alone was enough to show its power.
“The sword will make its appearance in three days. I want it no matter what, and you'll do everything to bring it back to me. All of you can travel to Erudia now.”
Dark Emperor looked at Zoey. “Do everything you can, especially you.”
Thanks to Dark Emperor's training, Zoey became the perfect killing machine. He erased all her emotions, leaving nothing but the desire for revenge within her.
Over the last three years, Dark Emperor pushed her deeper and deeper into the hell of vengeance. The Lab of Gods might be gone, but Dark Emperor made it look like it was thanks to his and Zoey's efforts.
He made a lot of arrangements misleading Zoey to believe that she killed the staff of the Lab of Gods. Thanks to that, she thought she got her revenge.
Finally, he took her to the fake base of the Lab of Gods and let her witness its destruction.
Because of that, she thought she had finally avenged Levi.
Thanks to that, Zoey trusted Dark Emperor with all her soul, becoming his personal killing machine that followed his every order. Aside from him, Zoey listened to nobody else.
On top of that, Dark Emperor made her believe that she had a lot of enemies back in Erudia, including Kirin, Azure Dragon, Robed Slayer, and The Cardinal Hall.
He made them out to be hypocrites who caused Levi's death through a conspiracy. Because of that, Zoey saw them as the enemies that she must kill.
She wanted nothing more than to kill her enemies, but she was forbidden from entering Erudia. This was because of her mass killing including those who were innocent and that made her the public enemy of Erudia. Anyone could kill her on sight, and she'd be dead if it weren't because nobody could track her down.
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