Momentum Breaker

Format legality

Where you can play Momentum Breaker in sanctioned and popular formats.

All printings

Prices range from $0.28 to $0.37 across finishes. Cheapest printing: Aetherdrift at $0.28.

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Rulings

Official rulings from Wizards of the Coast (6).

• 2025-02-07Start your engines! isn’t a triggered ability. Increasing your speed to 1 is something that happens as a state-based action as soon as you control a permanent with the ability. Notably, this includes gaining control of a permanent with the ability that another player controls.
• 2025-02-07Your speed doesn’t change until a spell or ability says so, such as the inherent triggered ability that cares about opponents losing life during your turn. Notably, losing control of permanents with start your engines! doesn’t affect your speed.
• 2025-02-07Each player tracks their speed (or lack thereof) separately. Increasing your speed has no effect on whether another player has speed.
• 2025-02-07If an effect needs to know what a player’s speed is and that player doesn’t have a speed, their speed is considered 0.
• 2025-02-07A player “has max speed” if their speed is 4.
• 2025-02-07“Max speed — [ability]” means “As long as you have max speed, this object has [ability].” If the granted ability functions in a zone other than the battlefield, the max speed ability does too.

Frequently asked questions