対抗変転 {U}{U}{R}

インスタント

対抗変転は呪文や能力によっては打ち消されない。あなたがコントロールしていない呪文１つを対象とし、それを打ち消す。超過{1}{U}{U}{R}（あなたはこの呪文をこれの超過コストで唱えてもよい。そうしたなら、あなたがコントロールしていない各呪文をそれぞれ打ち消す。）

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Only the English version of a Magic card receives Oracle updates and errata. View this card in English. (Scryfall note)
Because a spell with overload doesn’t target when its overload cost is paid, it may affect permanents with hexproof or with protection from the appropriate color. (2013-04-15)
Note that if the spell with overload is dealing damage, protection from that spell’s color will still prevent that damage. (2013-04-15)
Overload doesn’t change when you can cast the spell. (2013-04-15)
Casting a spell with overload doesn’t change that spell’s mana cost. You just pay the overload cost instead. (2013-04-15)

If you don’t pay the overload cost of a spell, that spell will have a single target. If you pay the overload cost, the spell won’t have any targets. (2013-04-15)
Effects that cause you to pay more or less for a spell will cause you to pay that much more or less while casting it for its overload cost, too. (2013-04-15)
If you are instructed to cast a spell with overload “without paying its mana cost,” you can’t choose to pay its overload cost instead. (2013-04-15)