Invasion of Karsus // Refraction Elemental [March of the Machine]Set: March of the Machine Type: Battle Siege Rarity: Rare Cost: {2}{R}{R} (As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.) When Invasion of Karsus enters the battlefield, it deals 3 damage to each creature and each planeswalker. The crystal landslide stirred over the shattered forms of the Machine Legion vanguard, and then it rose and rearranged itself into an