Lightning Dust's Ascent into Alicornhood

Lightning Dust heard a series of knocks on her door. "Hello?" she asked the knocks. "Their Majesties Princess Luna and Princess Celestia requested that we escort Miss Lightning Dust to the Royal Canterlot Castle at once." "Sure." said Lightning Dust, almost leaping outside, making sure her hat didn't fall off. The two guards were hooked up to a small plain-looking chariot. "This way, madam." said the first guard. "We're off for Canterlot...Now." said the second, as they took off. The ride was short, but quite scenic and splendid. Lightning Dust gazed upon the ponyfolk of Ponyville. Then, the guards landed. "We have landed at the front gates of the Royal Castle." proclaimed the first guard in accordance. The second one added, "Head straight through the main doors, and take the first left you see, and you will arrive at the Throne Room of Their Majesties Princess Luna and Princess Celestia." "Thanks." said Lightning. And so, she did take the first left, and arrived in the throne room of the princesses. Lightning Dust found that Celestia was reading a rather important-looking book. "Hello, Princess Celestia." said Lightning. "Ah, hello, Miss Dust." said the princess cheerfully, looking up from her book. "Please, call me Lightning Dust, ma'am." Lighting Dust told Celestia, because she despised the princess's little nickname for her. "Luna!" Celestia called. "What, dear sister?" asked Luna. "Hello, Princess Luna." Lightning said with a wave. "Ah, Lightning Dust, I am so glad to see you."  "So, why was I brought here?" Lightning asked. "Well." began Luna, "What I didn't tell you- in my letter requesting your travel here- "Is that we need your help to solve this alicorn conundrum." said Celestia, abruptly cutting Luna off. "Sure, so where do we start? Do I need to, like get a dragon's scale or something? An albino bluebird's feather?"  "We are still working on that part, to tell the truth." said Luna, beginning to get her stolen thunder back. "Actually, as of now, my sister is researching this subject? May I ask how it is going, sister?"  "It is going wonderful, Luna." said Celestia. "I find this subject quite interesting." "How wonderful. Celestia, any new leads?" "Yes. I found out that the source of this phenomenon is ensued only by casting a spell."  "A spell?" asked Lightning Dust. "Sounds like there's some begrudgery afoot." said Celestia. "Lightning Dust, you are dismissed. I will send letters to you daily." said Luna. "Sounds like a plan." replied Lightning.