Ein sprießendes Paradox urtümlicher Logik.

Rankenschimmer-Knoten

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

Un paradoxe verdoyant de logique primaire.

Lacis pâlevigne

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

蔦明の交錯

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

Vineglimmer Snarl

As Vineglimmer Snarl enters, you may reveal a Forest or Island card from your hand. If you don't, Vineglimmer Snarl enters tapped.
{T}: Add {G} or {U}.

Duskmourn: House of Horror Commander

Modern Horizons 3 Commander

As Vineglimmer Snarl enters the battlefield, you may reveal a Forest or Island card from your hand. If you don't, Vineglimmer Snarl enters the battlefield tapped.
{T}: Add {G} or {U}.

The Lost Caverns of Ixalan Commander

"It has strange properties, a Metebelis crystal. It can affect the mind."
—The Third Doctor

Doctor Who

 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.