Keyword: Landwalk

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
Harbor Serpent can’t attack unless there are five or more Islands on the battlefield.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
All lands are Islands in addition to their other types.
Creatures without flying or islandwalk can’t attack.

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters with a +1/+1 counter on it.)
Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
Harbor Serpent can’t attack unless there are five or more Islands on the battlefield.

Islandwalk, swampwalk (This creature can’t be blocked as long as defending player controls an Island or a Swamp.)
Whenever Wrexial, the Risen Deep deals combat damage to a player, you may cast target instant or sorcery card from that player’s graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
All lands are Islands in addition to their other types.
Creatures without flying or islandwalk can’t attack.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
Whenever Merfolk Spy deals combat damage to a player, that player reveals a card at random from their hand.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
Harbor Serpent can’t attack unless there are five or more Islands on the battlefield.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
: Regenerate River Boa.

Trample
Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
Shroud (This creature can’t be the target of spells or abilities.)

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
Whenever Cold-Eyed Selkie deals combat damage to a player, you may draw that many cards.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
: Target Merfolk you control gains protection from the color of your choice until end of turn.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
When Merrow Harbinger enters, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
When Inkfathom Divers enters, look at the top four cards of your library, then put them back in any order.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

Snow landwalk (This creature can’t be blocked as long as defending player controls a snow land.)
: Regenerate Zombie Musher. ( can be paid with one mana from a snow source.)

Nonbasic landwalk (This creature can’t be blocked as long as defending player controls a nonbasic land.)

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)