Priority Boarding 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
Whenever you roll a die, you may reveal the top card of your library. Do this only once each turn. Whenever you reveal a card with mana value less than the result this way, you may exile it. If you do, you may play it this turn.
Complete guide
Priority Boarding is a red enchantment that turns your lucky die rolls into fresh opportunities for card advantage. By watching your library's top card, you can capitalize on high rolls to cast spells or play lands you wouldn't otherwise have access to. It bridges the gap between chaos and strategy for any deck that loves rolling dice.
How it Works
Whenever you roll a die, Priority Boarding triggers. Upon resolution, you may choose to reveal the top card of your library. If the revealed card's mana value is strictly less than the result of the die roll, you have the option to exile it. Once exiled, you are permitted to play that card until the end of the current turn. Note that once you choose to reveal a card, the ability will not trigger again for the rest of the turn, regardless of whether you exiled the card or not.
The Step-by-Step Resolution
First, an effect causes you to roll a die. This puts the Priority Boarding trigger on the stack. When the trigger resolves, you decide whether to reveal your top card; if you do, the 'once each turn' restriction kicks in immediately. You compare the mana value to the roll result. If the mana value is lower, you may move the card to the exile zone. This grants you a continuous effect allowing you to play the card following normal timing rules.
Common Pitfalls
A common mistake is forgetting that 'playing' a card still requires you to follow all timing restrictions. Exiling a sorcery doesn't let you cast it on an opponent's turn. Additionally, if you roll multiple dice at once, you get multiple triggers on the stack, but as soon as you choose to reveal a card for one of those triggers, all other Priority Boarding triggers remaining on the stack (and any future ones that turn) will effectively do nothing.
Strategic Timing
Because this ability only triggers once per turn, you should be mindful of when you roll. If you have multiple ways to roll dice, you might want to wait for an effect that uses a larger die (like a d20) to increase your chances of the mana value being lower than the result. If you reveal a land, remember it counts as your land play for the turn.
Interaction examples
Impact TremorsIf you roll a 3 on a die, you reveal the top card of your library. If that card is Impact Tremors, which has a mana value of 2, you may exile it. Since 2 is less than 3, the condition is met, and you can cast Impact Tremors during your main phase that turn.
Underworld BreachSuppose you roll a 2 and reveal Underworld Breach. Because Underworld Breach has a mana value of 2, it is NOT less than the result of 2. You cannot exile the card. Furthermore, because you chose to reveal it, Priority Boarding is now 'used up' for the turn and will not trigger again even if you roll more dice.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Priority Boarding
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
If you roll several dice at the same time, that will trigger the ability once for each roll. You can choose which result you want to reveal a card for.
No other card is named in this ruling.
- #2· Wizards of the Coast
Once you choose to reveal the top card of your library during the resolution of Priority Boarding’s ability, that ability won’t trigger again that turn, no matter how many more dice you roll. This is true even if the card you reveal has a mana value too great to be exiled or you reveal a card you could exile but choose not to.
No other card is named in this ruling.
- #3· Wizards of the Coast
Priority Boarding doesn’t change when you can play the exiled card. For example, if you exile a sorcery card, you can cast it only during your main phase when the stack is empty. If you exile a land card, you can play it only during your main phase and only if you have an available land play remaining.
No other card is named in this ruling.
Legal formats
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Meta decks with Priority Boarding
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