If you notice the ONLY beast card in the deck is 1x Gonk, the Raptor. If you add Predatory Instincts this will give you a better chance at not only gaining the most important card in your deck but also give it 18 health. Some times you don't get Twig of the World Tree and may be forced to play Gonk, the Raptor and hope it lasts a turn till you can use Faceless Manipulator or Flobbidinous Floop. I can think of a couple cards in this deck i am willing to lose so i can gain this amazing card.
2x Pounce
2x Claw
2x Lesser Jasper Spellstone
2x Naturalize
2x Wild