Mythos of Nethroi

Format legality

Where you can play Mythos of Nethroi in sanctioned and popular formats.

All printings (5)

Prices range from $0.28 to $1.49 across finishes. Cheapest printing: Ikoria: Lair of Behemoths Promos at $0.28.

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Rulings

Official rulings from Wizards of the Coast (5).

• 2020-04-17If an effect copies the Mythos spell, no mana was spent to cast the copy, so the copy won’t receive the bonus.
• 2020-04-17Mythos 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.
• 2020-04-17The 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.
• 2020-04-17The 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.
• 2020-04-17If 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.

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