銀炎の儀式
ソーサリー
あなたがコントロールしている各クリーチャーの上に＋１/＋１カウンターをそれぞれ１個置く。
一徹 ― この呪文を唱えるために白マナが３点以上支払われていたなら、ターン終了時まで、あなたがコントロールしているクリーチャーは警戒を得る。
炎で鍛えられ美徳のもとに集うアーデンベイルの騎士たちは、ただ一つの強固な意志をもって戦う。
イラスト：
Throne of Eldraine#30コモン日本語適正
裁定
If an instant or sorcery spell has an adamant ability, you perform the spell’s instructions in order. You don’t perform the adamant instruction before the spell resolves or before any other effects printed above it.
If an effect allows you to cast a spell without paying its mana cost, you can’t choose to cast it and pay unless another rule or effect allows you to cast that spell for a cost. Similarly, you can’t waive a cost reduction unless that effect says you may.
Adamant effects check what mana was actually spent to cast a spell. If an effect allows you to spend mana “as though it were mana” of any color or type, that allows you to spend mana you couldn’t otherwise spend, but it doesn’t change what mana you spent to cast the spell.
If you copy a spell that has an adamant ability, no mana was spent to cast the copy at all, so that ability won’t apply.