I really kind of wish that a brony would make a hearthstone rip off with the mane six as the classes, kind of like how the CCG game has you choose a mane character as your character, as I think hearthstone’s much easier and more fun than the current CCG game.
 
This is my take on Applejack as a class; her focus is on heavy duty tank minions to protect some weaker cards with special effects, and a few cards designed to create card disadvantage.  
Her hero power is to create a 0 cost apple card that can be used to heal a minion (unusable on the hero) for 2 health. I originally was going to have this be less healing but be usable to instead increase a minion’s attack, but I figure that buffing characters feels like something that would fit Rarity’s flavor more with her accessorizing making sense for a buff class.