Excise the Imperfect
Instant
Oracle Text
Exile target nonland permanent. Its controller incubates X, where X is its mana value. (They create an Incubator token with X +1/+1 counters on it and "Rules for this card
Rulings (1)
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Wizards of the CoastIf the nonland permanent is an illegal target at the time Excise the Imperfect tries to resolve, it won't resolve and none of its effects will happen. Its controller won't incubate.