Meanwhile, Starlight went looking for Twilight as she walked around the forest. Searching around, she had this ugly feeling that Twilight was planning something. Her constant absences were a dead giveaway as if she wanted to get caught. She then scavenged around the forest for any clues involving Twilight or Celestia. Something that could help her unravel Twilight’s secret.

It was then she sense a presence. One that was unmistakable. It was too obvious to ignore, let alone turn away. Starlight immediately ran over to the source. It was like she hadn’t even tried to hide herself. Starlight wouldn’t admit it, but when she saw her, it sent a shiver down her spine. However, this was no time to show weakness. She made her presence known and spoke.

“Why are you here staring off at the abyss...? Stand up,” she said with fierceness in her voice. Twilight didn’t respond but took a quick glance at the former’s apprentice. “... I- no… everypony felt your presence. How right after Princess Celestia was slayed, there was a burst of anger, hate and retribution emanating from you. We all felt your outburst. And to make matters worse, you let yourself be lost in this place... and for what? Did you have something to do with her death?”

Twilight didn’t move an inch but this time, she spoke. “...What are you talking about?”

Starlight didn’t buy it for even a second. She went up towards Twilight and stood in front of her. Twilight moved her head upwards and looked at Starlight before moving her down again.

“Is that right?” Starlight asked with a slight chuckle. That was short lived as she yelled, “I know your game, Twilight Sparkle! You think I’m going to buy that excuse for even a second?! The Princess of Light is gone and I’m in no mood for your cryptic bullshit!” she said as she pushed on.

Twilight raised her head back up towards Starlight. This time, she had this deathly look in her eyes. “...Don’t test me, Starlight,” she said coldly.

Starlight flinched upon seeing Twilight look at her, but did not falter. She continued to look at Twilight as she confronted her further. “Why are you here instead of helping with damage control at the empire?! Just why in the hell are you here in this forest?!” Starlight demanded, lighting her horn up. Twilight stayed silent as she stared at the abyss. Starlight continued to harass as Twilight ignored her. “You’ve disappeared more times than I can count… never telling anypony where you go… and here you are, gazing at the abyss. I will not back away, Twilight. What have you been doing for the past few days?” Twilight remained silent and continued to ignore her. Starlight was beginning to lose her patience. “I know you’re involved; I just don’t know how. You know something… Why won’t you open up? Did you really do the unthinkable?!”

“...I’m not going to say it again, Starlight,” she said, now even more angry albeit, keeping her tone stoic. “I’m already at my wits end… you don’t wanna know what I am capable of doing to you if you don’t leave my sights.”

This was the first time Starlight noticed any type of reaction out of her. One that felt strangely genuine though she knew better.

“If you’re not guilty of anything, why are you getting so worked up about it?! You didn’t even care about her!” Twilight looked at her with one eye closed on her. “If I remember right, you didn’t show any remorse when she left!”

Twilight looked down and in a cold and emotionless matter, she said, “You're delusional.”

Starlight was surprised by her comment. Not because she was angry, but because she appeared to be heartless. “She’s really… gone…” she thought. “Delusional?! Ever since the Princess of Light called you out about Spike, you complained about being held back. About how long she is- no... was holding you back. You hated her. To be honest, I’m shocked that you’re not happy about this, since now that she’s gone, you no longer have to-”

Twilight had just about enough of Starlight’s tirade. She got off the ground and looked at Starlight. She pulled out her scythe and in a grim tone, said, “You've gone too far, Starlight.”

Starlight was surprised at first when she pulled out her weapon. However, that shock soon turn into anger. Anger that felt ready to be unleashed. “So you… finally show your true colors… you think you can scare me!?” she asked in anger. She glowed her horn brighter, ready an attack. “You just signed your death warrant, Twilight Sparkle. Or rather, you reaped what you sowed!”

With that, Twilight charged at Starlight in full fury. Starlight dodged the first swing, but knew that she wouldn’t miss the next time. Then, Twilight slammed her scythe into ground with the darkness coming out. After Starlight jumped away, Twilight used her horn to levitate her scythe, making it spin like a saw-blade. As Twilight sent her Scythe at Starlight, she managed to avoid it, albeit nearly grazing her tail. Without delay, Starlight fired a blast from her horn and broke the scythe.

Unfortunately, that proved to be a mistake as not only was Twilight smiling as she did, but a black ooze spilled out of it. A dark and sinister laugh could be heard from it.

“What… is this…?” Starlight thought as the ooze crawled on the ground. As the pieces fell, so did the ooze. It started to reassemble, like a fly to a corpse, it was meant for Twilight. Seeing this just infuriated Starlight even more. Starlight teleported her staff and grabbed Twilight by the cloth. “Twilight! What the hell happen to your weapon?! Why is that ooze on your weapon?!”

Twilight continued to laugh as the ooze crawled onto her. The ooze made her more manic than before. Only one thing filled her mind. Killing anypony who got in her way.

“Twilight! This is wrong!” Starlight yelled, still holding onto Twilight’s cloth. Her words couldn’t pierce though her corrupt mind. It was too late as the ooze got all over her body. “How did this happen? Why won’t you let me help you?”

“How dare he…?”

Starlight let her go and the laughing stopped. “Why can’t you let us help you?” she asked, still trying to reason with the now maniacal unicorn.

“How could he…?”

“Why do you have to always act on your own and not rely on your friends?”

“Why did he… Kill her…?”

“Why is it that you always have this guilt held back?” Starlight asked, nearly in tears.

Her corruption consumed her. Twilight couldn’t understand why she couldn’t stop attacking. Whatever reason she had was lost. Starlight collapsed onto the ground, exhausted from the fight.