Backlash — ruling 1

Being untapped is a targeting restriction. If the target is tapped before this spell resolves, then this spell doesn’t resolve.

Backlash : règles, fonctionnement et interactions (MTG)

Backlash 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

Tap target untapped creature. That creature deals damage equal to its power to its controller.

How it works : Backlash

Original English text — Wizards of the Coast / Scryfall

#1October 4, 2004· Wizards of the Coast
Being untapped is a targeting restriction. If the target is tapped before this spell resolves, then this spell doesn’t resolve.
No other card is named in this ruling.