Key to the Side-Door — ruling 1

Activating the first ability of Key to the Side-Door after a creature has become blocked won't cause that creature to become unblocked.

Key to the Side-Door : règles, fonctionnement et interactions (MTG)

Key to the Side-Door 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

, : Target creature can't be blocked this turn. , , Discard a legendary card with the same name as a legendary permanent you control: Draw two cards.

How it works : Key to the Side-Door

Original English text — Wizards of the Coast / Scryfall

#1June 29, 2026· Wizards of the Coast
Activating the first ability of Key to the Side-Door after a creature has become blocked won't cause that creature to become unblocked.
No other card is named in this ruling.