Mountain (379) [Coldsnap Theme Decks] Tenth Edition Boast — {1}: You may

Boast — {1}: You may change Arni Brokenbrow's base power to 1 plus the greatest power among other creatures you control until end of turn

Set: Mystery Booster Type: Enchantment Rarity: Rare Cost: {1}{W}{W} Lands you control are Plains

Set: Wilds of Eldraine: Enchanting Tales Type: Enchantment Rarity: Rare Cost: {1}{W} Whenever you gain life

Set: Zendikar Rising Prerelease Promos Type: Sorcery Rarity: Rare Cost: {X}{R}{R} Sacrifice X lands

{W}: Beacon Hawk gets +0/+1 until end of turn

Mountain (379) [Coldsnap Theme Decks] Tenth Edition Boast — {1}: You maySet: Coldsnap Theme Decks Type: Basic Land Mountain Rarity: Common ({T}: Add {R}.)