Shiveroar

You can Enchant I
frost
 from your Underworld to a I
frost
 Elestral on your field. While Mountains of Boreas is Enchanted this Shiveroar cannot be targeted by opponents' Rune effects.
You can Enchant I
frost
 from your Underworld to a I
frost
 Elestral on your field. While Mountains of Boreas is Enchanted this Shiveroar cannot be targeted by opponents' Rune effects.
warningThis is not official Elestrals content. Your event judge always has the final word in rulings.