
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.
Harbor Serpent has 3 printings, first in Magic 2011 (2010). EDHREC ranks it #21,161 among Commander cards. It appears most in Slinn Voda, the Rising Deep decks (73 on EDHREC). It has 2 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.