Hafenstadt

Sowie die Hafenstadt ins Spiel kommt, kannst du eine Ebene- oder Insel-Karte aus deiner Hand offen vorzeigen. Falls du dies nicht tust, kommt die Hafenstadt getappt ins Spiel.
{T}: Erzeuge {W} oder {U}.

Ville portuaire

Au moment où la Ville portuaire arrive sur le champ de bataille, vous pouvez révéler une carte de plaine ou d'île de votre main. Si vous ne le faites pas, la Ville portuaire arrive sur le champ de bataille engagée.
{T} : Ajoutez {W} ou {U}.

港町

港町が戦場に出るに際し、あなたはあなたの手札にあり平地や島であるカード１枚を公開してもよい。そうしないなら、港町はタップ状態で戦場に出る。
{T}：{W}か{U}を加える。

Port Town

As this land enters, you may reveal a Plains or Island card from your hand. If you don't, this land enters tapped.
{T}: Add {W} or {U}.

Modern Horizons 3 Commander

As Port Town enters the battlefield, you may reveal a Plains or Island card from your hand. If you don't, Port Town enters the battlefield tapped.
{T}: Add {W} or {U}.

"Venezia. La Serenissima. Impossible city. Preposterous city."
—The Eleventh Doctor

Doctor Who

If a Plains or Island is entering the battlefield from your hand at the same time as Port Town, you may reveal the other land to have Port Town enter untapped.

If an effect instructs you to put Port Town onto the battlefield tapped, it will still enter the battlefield tapped even if you reveal a land card from your hand.

Lands don't have a subtype just because they can produce mana of the corresponding color. Port Town itself is neither a Plains nor an Island, even though it produces white and blue mana, so you can't reveal one to satisfy the ability of another.

You may reveal any land card with either or both of the appropriate subtypes. It doesn't have to be a basic land. For example, you could reveal Canopy Vista from the Battle for Zendikar set to satisfy the ability of Port Town.