Twilight and Spike arrived in Canterlot quickly. Twilight immediately headed for the princesses' castle. She landed in front of the doors and opened them.
She walked inside and, as she was walking looked at the pictures on the stained glass windows, remembering all those moments.
Spike interrupted her thoughts. "Memories?" Spike asked. Twilight giggled a little, "Yes, Spike" she turned and smiled at him.
She then made it to the doors that led to the throne room. She opened them, and walked through into the throne room.
Princess Celestia, Princess Luna, and Princess Cadence were sitting in the throne room. "Twilight! My most prized pupil" Princess Celestia said, happy to see Twilight.
"Hello there, Princesses." "How may we help you?" Celestia asked. "We may have a...crisis, on our hooves" Twilight said. "What would that be?" Princess Luna asked.
Twilight took a deep breath. "A glacier is on it's way to Ponyville!" The princesses gasped. "I thought my crystal rock would stop it?" Cadence said confused.
Then Twilight realized something. "I think our little dragon has something to say about that." Twilight grabbed Spike with her magic and placed him down in front of her.
Spike looked back at Twilight and she gestured to tell them. "What did you do now, Spike?" Cadence asked Spike.
Spike had a nervous expression on his face, but he sucked it up. "I'm sorry, Cadence. I took your crystal rock and ate it."
Spike felt ashamed, he didn't realize that rock was stopping the glacier. "I didn't realize that rock was stopping the glacier."
Cadence then, instead of being mad, became happy. "It's okay, Spike. I forgot how much you like gems."
Spike felt relief. "By the way, Cadence, aren't you supposed to be in the Crystal Empire?" Twilight asked "Well, the glacier covered the Crystal Empire."
Twilight gasped. "What! How!?" Spike said. "Well, luckily, Shining Armor managed to put a force field around the Empire. So, it's protected."
Twilight and Spike sighed in relief. "Now what do we do?" Luna asked. Celestia then came up with an idea. "Follow me. I have an idea. Twilight, lead the way."
Twilight nodded. Spike hopped on her back and Twilight, followed by the Princesses, headed back to Ponyville.
Meanwhile, back in Ponyville, everypony was getting in position to stop the glacier. "This way, everypony!" Applejack shouted.
"That's it! Keep it coming!" Rainbow yelled. "You think this will be enough?" Fluttershy asked Rainbow Dash. "I hope so" Rainbow replied.
"Come on! Come on!" Rainbow shouted. "This way! Right there!" Rarity shouted to the unicorns "Form a line here!" she continued.
Pinkie was wishing luck to everypony. Then, she saw Twilight and the other 3 Princesses. "Hey, Everypony!" Pinkie shouted. "The 4 princesses are here!"
They all awed at the 4 as they landed on a little hill. Below where they were at was where everypony was lining up the to stop the glacier and behind them, Ponyville.
"Alright, princesses" Celestia said, "Combing our magic, we can form an immovable stone." "That will definitely stop the glacier" Cadence said.
They began to start forming the stone. "Can I help?" Twilight asked. "No, Twilight. We can handle this" Celestia said.
"All you need to do is stop that glacier long enough so that we can form the stone" Cadence said.
Twilight nodded and gave the princesses a hug before they started making the stone. Twilight then looked at the glacier.
It was about a half mile away and it was closing in fast. "Alright, everypony, give it everything you've got!" Twilight shouted and the first to charge were the pegasi.
They went up against the glacier, high above the thrown debris. They managed to slow it down a little bit, enough where there was no more thrown debris.
Then, the earth ponies charged. Slowing it even more, but it still moved them.
Then the unicorn's, using their magic, slowed it even more, where it was hardly even moving. Twilight looked back and the stone was almost done.
Some ponies were starting to give out, but that was still not enough to get the glacier moving any faster.
The princesses were done with the stone. "Twilight! It's done." Cadence said. Twilight immediately went to them. "It can only be lifted by alicorn magic." Celestia said.
"You have the honor of placing it." Luna said. They bowed to Twilight and she picked up the stone with her magic.
She scanned the base of the glacier, thinking where to put it. "Twilight" Spike said. Twilight looked back at Spike.
He was pointing at something so she followed where he was pointing. It was the original hole where the crystal rock was at.
"That's perfect, Spike" she said, smiling at him and he smiled back. She flew over, and placed the stone in place.
"Alright, everypony can stop!" Twilight shouted. Everypony stopped and they slowly backed away. The glacier didn't even budge. Twilight sighed in relief.
Then, the stone started glowing with the princesses magic. The crack that ran along the glacier's face from the stone to the very top ceiled. Ponyville was saved!
Everypony cheered. The glacier that threatened to destroy Ponyville has been stopped. Twilight was relieved and her friends were cheering for her.
"You did it!" Rainbow Dash said. "Well I'll be" Applejack said "Excellent, darling!" Rarity said. "Yay" Fluttershy said quietly.
"This calls for a Party!" Pinkie said happily. "Thank you, girls. But I couldn't have done it with out you guys." They all engaged in a group hug.