Harbor Serpent Tweet In-Store Pickup Only Light Play, English, 12 in stock $0.32 Details Color: Blue 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. Rarity: C Cost: 4UU Pow/Tgh: 5/5 Card Type: Creature - Serpent Artist: Daarken Name: Harbor Serpent Finish: Regular Card Number: 56/249 Set Name: Magic 2011