The next morning was far more pleasant than the day before. They woke up with their strength returned and a new determination. Their breakfast consisted mostly of berries and some herbs, but their hunger was not important to them. When Luna woke up she could no longer spot the force field that had surrounded Ponyville. The battle between The Overlord and Discord must have ended, and since she could no longer feel chaos in the magical flow, Discord must've lost. She decided not to tell the others, as more loss would only result in their spirits being too broken to continue.
When everyone had woken up and eaten their meals, Luna cleared her throat to address them,

"Now I know we experienced a truly terrible thing yesterday," they all looked down, still mourning for their lost princess. "But we must carry on in the name of my lost sister. There is a spell that can be preformed with the Elements that will not only vanquish The Overlord, but will reverse all of the evil actions he has done."

They all gasped at this. A chance to bring Celestia back from the dead sounded almost too good to be true.

"But in three weeks time the sun will burn out, and Celestia will be lost forever."

"Well then what are we waiting for?" They all looked at Rainbow Dash, " We need to hoof it to the Tree now! At we gonna sit around and wait for that jerk to destroy Equestria? Or are we gonna go kick his butt, and bring or princess back?"

"For the Princess!" They shouted in unison.

With that they began the short walk to the Tree. Luna thought she would never smile again, but these ponies just seem to find the light in every dark corner.
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Even with their great ruler dead they still carry on.

He had given up. The Overlord was too much. He tried to fight against him, but the things he had just done were unforgivable, and no doubt that when those survivors came upon the town, they would surely lose every last scrap of hope when they've seen what He did.
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Retrieving the Elements from the Tree wasn't too spectacular. Getting there was easy, and a flash of light and the Elements were in their original jewel form. Rarity made Luna some makeshift saddlebags to store the Elements in.
Now they were making their way back to Ponyville. They met little resistance from the animals, and the weather was easy on them. The sky was now blood-red, and the exploding Sun was now twice as large as before. Upon reaching Ponyville, they were blocked by a magical barrier surrounding the perimeter of the town. The barrier was tinted pitch-black, making it impossible to see through. Then they heard the horrible voice that now sparked hatred in all of them.

Well...I am a little surprised. I just murdered someone in front of you, give you lives that are made nothing but suffering, and yet you still return.

Luna took a deep breath, fighting to control her anger, "I, Princess Luna, ruler of the night and protector of Equestria demand that you lower this wall and I wish an audience with you."

The Overlord erupted into a fit of maniacal laughter.

First of all you DEMAND I lower the barrier? Why, you simply just had to ask politely. Second, I'm afraid that what lies beyond this wall, won't please you in the least bit.

When the barrier was lowered, what they saw went beyond all evil known in Equestria. The sight was horrifying, their grief and anger returned. All determination and hope they previously had dropped out of their stomachs. For what lay before them was utterly devastating.

Bodies were strewn everywhere. The residents of Ponyville were now corpses lying in pools of their own blood. They were frozen in place, nobody knew what to say or what to do about the revolting scene in front of them.

I told you you would regret leaving this town.

There was a flash of movement in the center of this horrific sight. It was enough to snap them out of their initial shock. Twilight looked to Luna's saddlebags, "Remember girls, remember what happens if we succeed." She felt a small tapping on her front leg. She looked down to see Spike turning a shade of green.

"Uh Twilight, is it okay if I wait outside?"

"It's gonna be okay Spike, just remember, they can come back. Just keep your eyes forward, and don't think about anything else. That goes for all of you."

Their hope and determination returned. With a look of someone willing to do what takes to save a planet. A cold hard stare. They looked forward and set a slow steady pace, one thought that echoed through their minds that kept them going.

Remember what happens if we succeed.

The smell hit their nostrils with the first few steps. It was gut-wrenching and just awful. But they kept their breakfast down and continued forward.

Remember what happens if we succeed.

There was more movement up ahead. They quickened their pace, getting a glimpse of two fillies, one white, and one a pale yellow.

Remember what happens if we succeed.

Don't forget what happens if you fail.

Now the two fillies were recognized as Sweetiebelle and Applebloom. Everyone except Rarity and Applejack stopped dead their tracks, the feeling of this was just wrong.

Applebloom was rubbing her eyes and Sweetiebelle was on her back clutching her stomach. Neither of the elder sisters had said a word when a black crystal burst from Sweetiebelle's abdomen, and Applebloom opened her eyes and blood started gushing from empty sockets.
The older sisters shrieked in horror, Fluttershy and Spike dropped to the ground covering their eyes and whimpering. The rest held their defiant stares with the manifested Overlord holding a struggling Scootaloo by the throat. He gave a tight squeeze and with a sickening pop, broke Scootaloo's neck.

Remember what happens if we succeed.

Remember what happens if we succeed.

This is what happens when you fail.

Author's Notes:

It was a blast to write this. That's all I have to say right now.