Platinum Prism couldn't stop herself. She didn't want to change. She wanted to change other ponies to think and be like her. This was exactly what she would do. She began her research and found the corruption spell she wanted. There was just one thing she'd need to pull it off. Only if she knew where to find it.
Platinum and the other mares searched every corner of Equestria for the Alicorn Amulet. "At last. The alicorn amulet. Once ponies activate my spell, they will bow to me! Mmwahhhaaa!" Platinum said as she snickered evilly. She knew that Dusk Shimmer wouldn't be able to beat out the alicorn amulet, unless, no, there was no way Dusk has the magical ability of an alicorn. If she could resist this spell….
Dusk and Blue Moon had just exited class for free period. After a few minutes, Orion approached Dusk. "Hey Dusk, can I ask you something?" "Y…Yeah." "I was wondering, if you'd like to, go to the Winter Waltz with me?" "Ok." "Great, thanks." Orion replied happily as he walked away. "Saphie, Did you hear that? Orion just asked me to the Winter Waltz!" "I heard! Congrats Duskie!" Blue Moon said as Dawn exited her classroom. "Hi Girls. What's up?" Dawn stated. "Not much, except Orion just asked Dusk to the Winter Waltz!" Saphie said excitedly. "Really?! Congrats sis! Neptune hasn't asked me yet. I do have some other good news." Dawn said. "What is it?" Duskie asked. "Princess Moona's coming back to Canterlot Academy!" "What? Cool!" Dusk and Saphie squeaked excitedly.
"Dawn do you feel that?" Dusk asked Dawn their horns began to glow without command. "Yeah, that's weird. We better find out what's going on." Dawn said as the two rushed off. After searching the school for a few minutes, the girls ran into Platinum. "Hello Ladies!" The two gasped as Dawn said, "What are you up to Platinum?" "Nothing much." "Oh, really? Then why do you have the alicorn amulet?" "Why are your horns glowing? We all have questions." "None of your business." Dawn replied as her and Dusk exited the conversation. "It's time to activate my spell. Everypony in the school will be affected, if not everypony in Canterlot."
Dusk and Dawn transported home to see if their younger sister's horns were glowing as well. Surely enough, all of their horns shone uncontrollably. Dusk's horn shone green, as Dawn's did blue. Sunny's horn gleamed a dark red as Luna's was deep blue. Did the sisters all have alicorn magic guarding over them? Was it their destiny to stop Platinum from executing her plan?
14 years prior….
"Dawn, I'm not sure your little sister's gonna make it." Sunset said in an upset tone. "No, I won't let her die!" "Dawn darling, there's nothing we can do." "I will guard my little sister with my life!" Dawn said as her eyes began to blow white. The filly had reached an alicorn form as she transferred some of her magic into her little sister. Afterwards, she fell unconscious. "Nurse, NURSE!" Sunset screamed. "Don't worry Dawn, you'll be ok." Sunset said comfortingly.
When Dawn awoke, she found herself in a room alone with her sister. She took the opportunity to tell her sister about the happenings of earlier. "Don't you worry, Dusk, you'll never have to face the world alone. I'll protect you with my life."
Present:
Dawn gasped as she awoke, saying "Duskie!" stirring her sister. "Huh? What is it Dawn?" "I just had a flashback of when I was little, when you almost died because of Tierk taking mom's magic." "Wait…is that why our magic is unaffected by the alicorn amulet?" "When my magic did that when I was little, it must have cast the same spell on mom, causing her offspring to be affected!" "Ok, then. Well that still doesn't keep anypony else from falling under Platinum's spell. We can go talk to Princess Harvest Moon in the morning. To keep our magic up, we need to get some sleep." "You're right. Goodnight Dusk." "Goodnight Dawn."
The next morning, the sisters rushed to catch Moona right as she was getting ready to go to the Academy. "Hi guys. What's the hurry? Come to think about it, what are you doing here?" "Platinum…amulet…hypnotization spell…" the sisters said, attempting to catch their breath. "Say no more." "Um Moona…we don't exactly know how this spell works. We need a book on spells that are casted from the alicorn amulet." Dawn replied. "I believe that book is in the Starswirl wing….Dusk? Dawn? Hello?"
Dawn and Dusk arrived at the Starswirl wing. "This part of the library is huge! How are we going to find a book to save everypony in time?" Dusk asked, intimidated by the large selection of books. "Identification spell. Use your horn, sis." Dawn said. "Hmmmm…." Dawn said as her horn fully enlightened. "Aha! Come on Dusk, we need to get going to whatever's left of our classes." The two, as usual when they had little time, transported themselves to the campus door to find chaos inside the building. "What in the name of Celestia?" Dawn said, as Dusk's mouth hung open. "We have to stop this." Dusk stated as Dawn nodded, referring to a spell only the two knew, as Dawn created it after the 'incident' 14 years ago.
"What the hay is going on Platinum?" Platinum whirled around to find the two resisting her spell. "What? How are you two fighting my spell?" "Spell? I thought you said you weren't up to anything." Dawn replied, as she urged Platinum to stop. "Platinum, this won't solve anything." "I could take over Equestria with my amulet and my army behind me." Dusk turned to find Orion had become one of her zombies. As Dusk's eyes teared up, the sisters activated their spell. "What are you doing?" Platinum asked as she gasped. Now unconscious, Platinum was defeated. Dusk and Dawn, however, awoke from their magic outburst to find that they'd gained wings. "What happened?" Dusk asked as she stared at her and Dawn's wings. "Did we just become alicorns?" "In fact, my little fillies, you have." Twilight said as she flew in. "Princess Twilight!" the sisters said as they bowed. "This has only happened in the combination of you magic. It's not permanent, however, you may use your magic for this reason whenever you like, but use it wisely." "Of course, Princess." The two said as the princess flew off. As their wings faded, the sister stared at Platinum gasped.