Favourites that I throw money at

• 
  Rites of Ascension Twilight makes a new spell and starts the gears of fate with her ascension to alicornhood. (Writing started before Season 3.) by CvBrony 699,646 words · 3,059 · 79
• 
  The Mare Who Once Lived on the Moon In a steampunk reimagining of the universe, Twilight Sparkle finds perhaps the one pony as lonely as she is. It's rather unfortunate that they're on the moon. by MrNumbers 143,130 words · 3,007 · 57
• 
  The Moon's Apprentice Twilight Sparkle failed her entrance exams for Celestia’s school. Worse, she is a danger to both herself and others, resulting in her magic being suppressed. Dreams crushed and now one of the weakest unicorns, a nightmare comes to her. by Forthwith 412,134 words · 3,776 · 169
• 
  Sharing the Night Twilight becomes alicorn of the stars. This is sort of a problem, because Luna kind of already was alicorn of the stars. Oops! by Cast-Iron Caryatid 234,498 words · 4,009 · 110
• 
  The Enchanted Library When one fateful search through the Everfree Forest leads Rarity to a secret library inhabited by the spirit of an ancient alicorn princess, she realises that it may be time to start believing in fairy tales. by Monochromatic 337,147 words · 4,643 · 69