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'This creature can't attack unless defending player controls an Island.
'This creature can't attack unless defending player controls an Island.
'This creature can't attack unless defending player controls an Island.
'This creature can't attack unless defending player controls an Island.
'This creature can't attack unless defending player controls an Island.
'This creature can't attack unless you control another artifact.
'This creature can't attack unless there are seven or more cards in your graveyard.
'When this creature enters, you lose 3 life.
Mighty warriors of the oceans, Naiad Wyrmriders are carried into battle upon the backs of sea serpents to crash upon their foes like a wave. Even out of the deeps...
'Krakens, Leviathans, Octopuses, and Serpents you control can't be blocked except by Krakens, Leviathans, Octopuses, and Serpents.
'When this creature enters, you lose 3 life.
'This creature can't attack unless defending player controls an Island. When you control no Islands, sacrifice this creature. Morph {5}{U} (You may cast this card face down as a 2/2...