name: Invasion of Karsus // Refraction Elemental
originalText: (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.
printings: MOM, PMOM
text: (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 this Siege enters, it deals 3 damage to each creature and each planeswalker.
type: Battle — Siege