Invasion of Ravnica // Guildpact Paragon [March of the Machine Prerelease Promos]Set: March of the Machine Prerelease Promos Type: Battle Siege Rarity: Mythic Cost: {5} (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 Ravnica enters the battlefield, exile target nonland permanent an opponent controls that isn't exactly two colors. Reverse Type: Artifact Creature Construct Whenever you cast a spell that's exactly two colors,