Tote Flussmündung

Sowie die Tote Flussmündung ins Spiel kommt, kannst du eine Insel- oder eine Sumpf-Karte aus deiner Hand offen vorzeigen. Falls du dies nicht tust, kommt die Tote Flussmündung getappt ins Spiel.
{T}: Erhöhe deinen Manavorrat um {U} oder {B}.

Estuario angosto

En cuanto el Estuario angosto entre al campo de batalla, puedes mostrar una carta de isla o pantano de tu mano. Si no lo haces, el Estuario angosto entra al campo de batalla girado.
{T}: Agrega {U} o {B} a tu reserva de maná.

Estuaire asphyxié

Au moment où l'Estuaire asphyxié arrive sur le champ de bataille, vous pouvez révéler une carte d'île ou de marais de votre main. Si vous ne le faites pas, l'Estuaire asphyxié arrive sur le champ de bataille engagé.
{T} : Ajoutez {U} ou {B} à votre réserve.

Estuario Soffocato

Mentre l'Estuario Soffocato entra nel campo di battaglia, puoi rivelare una carta Isola o Palude dalla tua mano. Se non lo fai, l'Estuario Soffocato entra nel campo di battaglia TAPpato.
{T}: Aggiungi {U} o {B} alla tua riserva di mana.

詰まった河口

詰まった河口が戦場に出るに際し、あなたはあなたの手札から島・カード１枚か沼・カード１枚を公開してもよい。そうしないなら、詰まった河口はタップ状態で戦場に出る。
{T}：あなたのマナ・プールに{U}か{B}を加える。

황폐화된 강어귀

황폐화된 강어귀가 전장에 들어오면서, 당신의 손에 있는 섬 또는 늪 카드 한 장을 공개할 수 있다. 그러지 않으면, 황폐화된 강어귀는 탭된 상태로 전장에 들어온다.
{T}: {U} 또는 {B}를 당신의 마나풀에 담는다.

Estuário Estrangulado

Conforme Estuário Estrangulado entra no campo de batalha, você pode revelar um card de Ilha ou Pântano de sua mão. Se não fizer isso, Estuário Estrangulado entrará no campo de batalha virado.
{T}: Adicione {U} ou {B} à sua reserva de mana.

Забитое Устье

При выходе Забитого Устья на поле битвы вы можете показать карту Острова или Болота из вашей руки. Если вы этого не делаете, Забитое Устье выходит на поле битвы повернутым.
{T}: добавьте {U} или {B} в ваше хранилище маны.

阻滞河口

于阻滞河口进战场时，你可以从你手上展示一张海岛或沼泽牌。如果你未如此作，阻滞河口须横置进战场。
{T}：加{U}或{B}到你的法术力池中。

阻滯河口

於阻滯河口進戰場時，你可以從你手上展示一張海島或沼澤牌。如果你未如此作，阻滯河口須橫置進戰場。
{T}：加{U}或{B}到你的魔法力池中。

Choked Estuary

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

Murders at Karlov Manor Commander

As Choked Estuary enters the battlefield, you may reveal an Island or Swamp card from your hand. If you don't, Choked Estuary enters the battlefield tapped.
{T}: Add {U} or {B}.

The Lost Caverns of Ixalan Commander

"You traveled five miles in twelve years?!"
—The Tenth Doctor

Doctor Who

If an Island or Swamp is entering the battlefield from your hand at the same time as Choked Estuary, you may reveal the other land to have Choked Estuary enter untapped.

If an effect instructs you to put Choked Estuary 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. Choked Estuary itself is neither an Island nor a Swamp, even though it produces blue and black 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 Prairie Stream from the Battle for Zendikar set to satisfy the ability of Choked Estuary.