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Islandwalk (This creature can't be blocked as long as defending player controls an Island.) This creature can't attack unless there are five or more Islands on the battlefield.
Abilities, attacks, weakness & resistance
Other cards from Magic 2012
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Harbor Serpent (M12-56) is a blue Creature — Serpent from the Magic 2012 core set that enters as a 5/5. It has Islandwalk, making it unblockable when an opponent controls an Island, and it can only attack if there are five or more Islands on the battlefield. Its attack restriction checks the number of Islands as attackers are declared and remains attacking even if that number later changes.
Catalog pricing data as of 30 Apr 2026, 16:45
