Harbor Serpent

four generic mana one blue mana Creature — SerpentPower and toughness5/5

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.

Like most giant monsters villagers worship as gods, it proves a fickle master.

Add to list

Showing Magic 2013#53

Price

0.10 $

Foil 0.31 $

32 printings · up to 0.19 $

Daily estimate from Scryfall, not a shop quote.

View onScryfall EDHREC

Buy this printingTCGplayer Cardmarket Cardhoarder

Harbor Serpent rulings

2010-08-15
Harbor Serpent's abilities care about lands with the land type Island, not necessarily lands named Island.
2010-08-15
The second ability checks how many Islands are on the battlefield (regardless of who controls them) only as attackers are declared. Once Harbor Serpent is declared as an attacker, it will continue to attack even if the number of Islands on the battlefield falls below five.

Harbor Serpent keyword rules

Landwalk Rule 702.14

Landwalk is a generic term that appears within an object’s rules text as “[type]walk,” where [type] is usually a land type, but it can also be the card type land plus any combination of land types, card types, and/or supertypes.

Landwalk is an evasion ability.

A creature with landwalk can’t be blocked as long as the defending player controls at least one land with the specified land type (as in “islandwalk”), with the specified type or supertype (as in “artifact landwalk”), without the specified type or supertype (as in “nonbasic landwalk”), or with both the specified type or supertype and the specified subtype (as in “snow swampwalk”). (See rule , “Declare Blockers Step.”)

Landwalk abilities don’t “cancel” one another.

Multiple instances of the same kind of landwalk on the same creature are redundant.