Arni Brokenbrow [Kaldheim Prerelease Promos]

Set: Kaldheim Prerelease Promos Type: Legendary Creature — Human Berserker Rarity: Rare Cost: {2}{R} HasteBoast — {1}: You may change Arni Brokenbrow's base power to 1 plus the greatest power among other creatures you control until end of turn. (Activate only if this creature attacked this turn and only once each turn.) "I headbutted a troll. And won."