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Harbinger of the Seas

Card Name

Harbinger of the Seas

Mana Cost

1

Type

Creature – Merfolk Wizard

Rarity

Rare

rules Text

Nonbasic lands are Islands.

Flavor Text

The rising moon calls mercilessly to the waves, commanding the sea to rise high enough to devour mountains.

Legal Formats

Commander, Explorer, Legacy, Modern, Vintage

Not Legal Formats

Alchemy, Brawl, Pauper, Pioneer, Standard

Banned Formats

Alchemy, Brawl, Pauper, Pioneer, Standard

Rulings

(6/7/2024)
If a nonbasic land has an ability that triggers "when" it enters the battlefield, it will lose that ability before it can trigger.
(6/7/2024)
If a nonbasic land has an ability that causes it to enter the battlefield tapped, it will lose that ability before it can apply. The same is also true of any other abilities that modify how a land enters the battlefield or apply "as" a land enters the battlefield, such as that of Vesuva or Cavern of Souls.
(6/7/2024)
Nonbasic lands lose any other land types and abilities they had. They gain the land type Island and gain the ability ": Add ."
(6/7/2024)
Harbinger of the Seas doesn't affect names or supertypes. It won't turn any land into a basic land or remove the legendary supertype from a legendary land, and the lands won't be named "Island."
(6/7/2024)
If Harbinger of the Seas loses its abilities, it continues to turn nonbasic lands into Islands. This is because effects that change subtypes are applied before considering effects that remove abilities, regardless of the order in which those effects started.