Cards like Pascal Rapunzels Companion, Stitch New Dog, Maleficent Sorceress, and more all have their place in certain competitive decks
The pure power of Arcbound Ravager in Affinity and the amount to which it warped the Magic world for a year are enough to get it this high
Well, you've got to discard a card at the beginning of each of your upkeep
For example, Jacked Rabbit creates 1/1 white Rabbits equal to its power everytime it attacks and if you happen to have used Offspring on Jacked Rabbit as you cast it, your Offspring will create an additional white Rabbit token every time either one of them attacks
I'm not sure if The Hobbit's dwarves will be Gruul or Boros, but even if it's the latter, a load of good, new, red dwarf cards could see this legend becoming much more popular