Islandwalk

[The lich lord]

Is there a card that can give all creatures island walk?

[LinkCelestrial]

{Stormtide Leviathan} is as good as it gets.

[LinkCelestrial]

Yeah but if you're making an island walk deck that's auto win.

There isn't a card that gives all your creatures a walk (that I know of). Think about it, it'd basically read "if your opponent is playing *insert colour*, that player loses the game." There's a reason they don't print cards like that anymore. It's a stupid way to die.

[Gorzo]

You can use {Traveler's Cloak} for an individual creature.

This probably doesn't belong in rules, btw.