Nascent Metamorph
Creature — Shapeshifter
Whenever this creature attacks or blocks, target opponent reveals cards from the top of their library until they reveal a creature card. This creature becomes a copy of that card until end of turn. Then that player puts all cards revealed this way on the bottom of their library in a random order.
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フォーマット
スタンダード : 不可パイオニア : 不可モダン : 不可レガシー : 可能ヴィンテージ : 可能パウパー : 不可統率者戦 : 可能デジタル専用フォーマット
アルケミー : 不可エクスプローラー : 不可ヒストリック : 不可タイムレス : 不可同名カード
統率者（2020年版）#36日本語
カード裁定
2020/04/17
原文The creature card that Nascent Metamorph becomes a copy of is put onto the bottom of the library along with any other cards.
2020/04/17
原文If the target opponent has no creature cards in their library, Nascent Metamorph doesn't become a copy of anything. The cards are returned to that library in a random order.
2020/04/17
原文If another permanent becomes a copy of Nascent Metamorph, it will become whatever Nascent Metamorph is copying. It remains a copy when Nascent Metamorph's effect ends.
2020/04/17
原文If an effect begins to apply to Nascent Metamorph before it becomes a copy, that effect will continue to apply.
2020/04/17
原文If Nascent Metamorph becomes a copy of a legendary card with the same name as a legendary permanent you control, you'll put one of them into its owner's graveyard.
2020/04/17
原文If Nascent Metamorph becomes a copy of an object with a set of linked abilities (for example, one ability that exiles a card and another that refers to the card "exiled with" the object), that link only lasts as long as Nascent Metamorph is copying that object. If it stops being a copy of that object and then becomes a copy again later, the link is lost.
data from gatherer