Burn the Impure — ruling 1

If the creature is an illegal target when Burn the Impure resolves, the spell won’t resolve and none of its effects will happen, even if that creature has infect.

Burn the Impure : règles, fonctionnement et interactions (MTG)

Burn the Impure 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

Burn the Impure deals 3 damage to target creature. If that creature has infect, Burn the Impure deals 3 damage to that creature's controller.

How it works : Burn the Impure

Original English text — Wizards of the Coast / Scryfall

#1June 1, 2011· Wizards of the Coast
If the creature is an illegal target when Burn the Impure resolves, the spell won’t resolve and none of its effects will happen, even if that creature has infect.
No other card is named in this ruling.