Name: Invasion of Karsus Cost: 2RR CMC: 4 Color: R CID: R Type: Battle -- Siege Rules 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. [Front face. Transforms into Refraction Elemental.] Set/Rarity: March of the Machine rare, March of the Machine Promos rare Legality: Legal in commander, Legal in legacy, Legal in timeless, Legal in oathbreaker, Legal in gladiator, Legal in modern, Legal in brawl, Legal in vintage, Legal in penny, Legal in historic, Legal in duel, Legal in pioneer Price: $0.15 Foil price: $0.32