Excise the Imperfect — ruling 1

If 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.

Excise the Imperfect : règles, fonctionnement et interactions (MTG)

Excise the Imperfect is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card 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 ": Transform this token." It transforms into a 0/0 Phyrexian artifact creature.)

How it works : Excise the Imperfect

Original English text — Wizards of the Coast / Scryfall

#1April 14, 2023· Wizards of the Coast
If 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.
No other card is named in this ruling.