ガルヴァノス

あなたのアップキープの開始時に、あなたはあなたのライブラリーの一番上のカードを見てもよい。それがインスタント・カードかソーサリー・カードである場合、あなたはそれをそのマナ・コストを支払うことなく唱えてもよい。

Galvanoth

At the beginning of your upkeep, you may look at the top card of your library. You may cast it without paying its mana cost if it's an instant or sorcery spell.

Duel Decks: Izzet vs. Golgari

At the beginning of your upkeep, you may look at the top card of your library. If it's an instant or sorcery card, you may cast it without paying its mana cost.

Mirrodin Besieged

If the card has an X in its mana cost, you must choose 0 as its value.

If the card has any mandatory additional costs, as Kuldotha Rebirth does, you must pay them in order to cast the spell.

If the card you look at isn’t an instant or sorcery card, it remains on top of your library. You don’t reveal it.

You may pay additional costs, such as kicker costs, of the instant or sorcery card.