涅司羅傳說 {2}{B}

瞬間

選擇目標非地永久物。如果它是生物或如果施放此咒語時支付過{G}{W}，則消滅之。

「然後這片陰影開始自己行動起來，隨即將那人全數吞下～身體、心靈、靈魂一樣不剩。」
～《歐佐晶岩傳說》

Illustrated by Seb McKinnon

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Ikoria: Lair of Behemoths #97

Only the English version of a Magic card receives Oracle updates and errata. View this card in English. (Scryfall note)
If an effect copies the Mythos spell, no mana was spent to cast the copy, so the copy won’t receive the bonus. (2020-04-17)
Mythos of Nethroi can target any nonland permanent. Determine as the spell resolves whether the permanent is destroyed, either because it’s a creature at that time or because {G}{W} was spent to cast the spell. (2020-04-17)
The abilities of the Mythos check what colors of mana were spent to cast the spell. It’s not an alternative cost to cast the spell. (2020-04-17)

The ability checks 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. (2020-04-17)
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. (2020-04-17)