Fernglas-Sirene

Fliegend
Wenn die Fernglas-Sirene ins Spiel kommt, erzeuge einen Lageplan-Spielstein. (Er ist ein Artefakt mit „{1}, {T}, opfere dieses Artefakt: Eine Kreatur deiner Wahl, die du kontrollierst, erkundet. Aktiviere diese Fähigkeit wie eine Hexerei.")

Sirena con catalejo

Vuela.
Cuando la Sirena con catalejo entre al campo de batalla, crea una ficha de Mapa. (Es un artefacto con "{1}, {T}, sacrificar este artefacto: La criatura objetivo que controlas explora. Activa esto solo como un conjuro".)

Sirène à la longue-vue

Vol
Quand la Sirène à la longue-vue arrive sur le champ de bataille, créez un jeton Carte. (C'est un artefact avec « {1}, {T}, sacrifiez cet artefact : Une créature ciblée que vous contrôlez explore. N'activez que lorsque vous pourriez lancer un rituel. »)

Sirena del Cannocchiale

Volare
Quando la Sirena del Cannocchiale entra nel campo di battaglia, crea una pedina Mappa. (È un artefatto con "{1}, {T}, Sacrifica questo artefatto: Una creatura bersaglio che controlli esplora. Attiva solo come una stregoneria".)

遠眼鏡のセイレーン

飛行
遠眼鏡のセイレーンが戦場に出たとき、地図・トークン１つを生成する。（それは「{1}, {T}, このアーティファクトを生け贄に捧げる：あなたがコントロールしているクリーチャー１体を対象とする。それは探検を行う。起動はソーサリーとしてのみ行う。」を持つアーティファクトである。）

Sirena da Luneta

Voar
Quando Sirena da Luneta entrar no campo de batalha, crie uma ficha de Mapa. (Ela é um artefato com "{1}, {T}, sacrifique este artefato: A criatura alvo que você controla explora. Ative somente como um feitiço".)

望远塞连

飞行
当望远塞连进战场时，派出一个地图衍生物。（它是具有「{1}，{T}，牺牲此神器：令目标由你操控的生物勘察。只能于法术时机起动」的神器。）

Spyglass Siren

Flying
When this creature enters, create a Map token. (It's an artifact with "{1}, {T}, Sacrifice this token: Target creature you control explores. Activate only as a sorcery.")

The Lost Caverns of Ixalan

Flying
When Spyglass Siren enters the battlefield, create a Map token. (It's an artifact with "{1}, {T}, Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery.")

Flying
When Spyglass Siren enters the battlefield, create a Map token.

If a resolving spell or ability instructs a specific creature to explore but that creature has left the battlefield, the creature still explores. If you reveal a nonland card this way, you won't put a +1/+1 counter on anything, but you may put the revealed card into your graveyard. Effects that trigger "whenever a creature explores" trigger as appropriate.

If an ability instructs a creature to explore, its controller reveals the top card of their library. If it's a land card, they'll put it into their hand. Otherwise, they'll put a +1/+1 counter on that creature, then choose to either leave that card on top of their library or put it into their graveyard.

If no card is revealed, most likely because that player's library is empty, the exploring creature receives a +1/+1 counter.

In some unusual cases, noncreature permanents may explore. For example, if the creature card returned by Defossilize is somehow not a creature once it's on the battlefield, it can still explore. You'll take all the same actions, and you may end up putting a +1/+1 counter on the permanent. (Note that some effects target a creature, and those effects would still require a legal target to have it explore.)

Map tokens are a kind of predefined token. Each one is a colorless artifact with the artifact subtype Map and the ability "{1}, {T}, Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery."

Once an ability that causes a creature to explore begins to resolve, no player may take any other actions until it's done. Notably, opponents can't try to remove the exploring creature after you reveal a nonland card but before it receives a counter.

Some spells or abilities might cause a creature to explore multiple times in a row. If you reveal a nonland card when a creature explores and leave it on top of your library, then the creature explores again immediately afterwards, you'll reveal the same card again.