I thought that Twilight Sparkle underwent a true apotheosis at the end of season 3. Word of God decreed contrariwise. Fine, thought I, at least she is the "Alicorn of Magic." All unicorns shall pay deference to her, even those specializing in specific types of magic. With but a thought, she will create a spate of mystic energy, allowing her to work spells of legendary complexity and scale. The Poniverse is now her fabric, and her mind the loom. :)

Alas, Princess Twilight's mastery of magic improves at a plodding pace, if it can be said to be improving at all. :(