Because in Theros there were 3 Planeswalkers there will only be one Planeswalker in Born of the Gods and Journey into Nyx. This Planeswalker is Kiora. Her +1 stops an opponents creature from dealing damage to you. Her -1 gives you a card and an extra land. But the big finish is her +5. It gives you a 9/9 Kraken every end step. Plus if you can get her more loyalty you can get two 9/9's every turn. This is a great Christmas present to us from Wizards.