"We're on the Thames. The last great Frost Fair. 1814, February the 4th."
—The Twelfth Doctor

„Wir sind auf der Themse. Der letzte große Frostjahrmarkt. 4. Februar, 1814."
—Der Zwölfte Doctor

Siedefrost-Knoten

Sowie der Siedefrost-Knoten ins Spiel kommt, kannst du eine Insel- oder Gebirge-Karte aus deiner Hand offen vorzeigen. Falls du dies nicht tust, kommt der Siedefrost-Knoten getappt ins Spiel.
{T}: Erzeuge {U} oder {R}.

« Nous sommes sur la Tamise. La dernière grande foire sur glace. Le 4 février 1814. »
—Le Douzième Docteur

Lacis pyrogel

Au moment où le Lacis pyrogel arrive sur le champ de bataille, vous pouvez révéler une carte d'île ou de montagne de votre main. Si vous ne le faites pas, le Lacis pyrogel arrive sur le champ de bataille engagé.
{T} : Ajoutez {U} ou {R}.

「テムズ川最後のフロストフェア、1814年２月４日だ。」
——12代目ドクター

凍沸の交錯

凍沸の交錯が戦場に出るに際し、あなたの手札にあり島や山であるカード１枚を公開してもよい。そうしないなら、凍沸の交錯はタップ状態で戦場に出る。
{T}：{U}か{R}を加える。

Frostboil Snarl

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

Aetherdrift Commander

Modern Horizons 3 Commander

As Frostboil Snarl enters the battlefield, you may reveal an Island or Mountain card from your hand. If you don't, Frostboil Snarl enters the battlefield tapped.
{T}: Add {U} or {R}.

Outlaws of Thunder Junction Commander

The Lost Caverns of Ixalan Commander

 If a land card with an appropriate subtype is entering the battlefield from your hand at the same time as one of these lands, you may reveal the other land to have the "Snarl" enter untapped.

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

 The "Snarl" itself doesn't have any land subtypes. 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 card.