And as I showed earlier with the gif they'd already heavily implied all the way back in the S6 finale that she was ready to fire off magical blasts at Chrysalis, if you're not counting the comics.
>>1297326p
...and in hindsight this wallpaper panoramic edit was actually a better demonstration than the gif. Drat, wish I found it earlier.
As great as "[beating a great number of changelings to a pulp":](/images/271373) with her bare hooves or "[nailing Applejack with a kick":](/images/1752281) is, Rarity would probably be aware that it's good to have _*options_* in a fight.
(as for why she didn't specifically try blasting in say, Campfire Tales, performing spells does require concentration, and being swarmed by bugs wouldn't really give a lot of breathing room in that regard, TK probably being a bit easier to focus on)