Stormtide Leviathan

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

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 is unblockable 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.