Harbor Serpent - Foil Tweet Out of stock. Wishlist Details Artist: Daarken Card Number: 56/249 Card Text: Islandwalk (This creature is unblockable as long as defending player controls an Island.)Harbor Serpent can't attack unless there are five or more Islands on the battlefield. Card Type: Creature - Serpent Color: Blue Cost: 4UU Finish: Foil Name: Harbor Serpent Pow/Tgh: 5/5 Rarity: C Set Name: Magic 2012