Buster Sword 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
Equipped creature gets +3/+2. Whenever equipped creature deals combat damage to a player, draw a card, then you may cast a spell from your hand with mana value less than or equal to that damage without paying its mana cost. Equip
Complete guide
The Buster Sword is a powerful Equipment that rewards aggressive play with both card advantage and free spells. By boosting your creature's combat prowess and letting you bypass mana costs, it can quickly snowball a game in your favor. Whether you are cutting through blockers or striking directly at your opponent, this artifact is a game-changer.
What It Does
Buster Sword provides a significant +3/+2 power and toughness boost to the equipped creature for an equip cost of {2}. Its most potent feature is a triggered ability that activates whenever the equipped creature deals combat damage to a player. When this happens, you draw a card first, and then you have the option to cast a spell from your hand for free, provided its mana value is less than or equal to the damage dealt.
Step-by-Step Resolution
First, the equipped creature must deal combat damage to a player; if it is blocked and all damage is dealt to creatures, the ability will not trigger. Once the ability triggers and resolves, you draw one card from your library. Next, you check the amount of combat damage that was actually dealt to the player. You may then choose a card in your hand with a mana value less than or equal to that damage and cast it without paying its mana cost. This happens during the resolution of the ability, meaning you ignore normal timing restrictions, such as casting a sorcery during the combat phase.
Common Mistakes
One common error is trying to save the free spell for later in the turn; you must cast it immediately as the ability resolves or lose the opportunity. If you choose a spell with {X} in its mana cost, X must be zero. Additionally, while you cannot use other alternative costs, you can—and must—pay any mandatory additional costs, and you may choose to pay optional additional costs like Kicker.
When to Play It
Buster Sword is best utilized in decks with evasive creatures that can reliably strike a player. Because the free spell is limited by the damage dealt, it pairs exceptionally well with creatures that have high base power or additional buffs. It is an excellent choice for Midrange or Voltron strategies where every combat phase needs to generate maximum value.
Interaction examples
Swiftfoot BootsIf you have Buster Sword and Swiftfoot Boots on the battlefield, you can equip both to a newly played creature. Swiftfoot Boots provides Haste, allowing the creature to attack immediately, and Hexproof to protect it from targeted removal. If the creature connects with the opponent, Buster Sword's ability triggers, allowing you to draw a card and potentially cast another spell for free before the turn ends.
Arcane SignetArcane Signet can help you get Buster Sword onto the battlefield or pay for the equip cost earlier than usual. If your creature deals 4 combat damage while equipped, you draw a card; if you draw a card like Arcane Signet, you cannot cast it for free with the trigger because the trigger requires you to cast the spell 'from your hand' and you already checked your hand for the free spell during resolution. However, if the Signet was already in your hand, its mana value of 2 is less than the 4 damage dealt, so you can cast it for free.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Buster Sword
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
You choose whether to cast a spell from among the cards in your hand as Buster Sword's middle ability resolves. You can't wait to cast one later in the turn. Timing restrictions based on the card's types are ignored.
No other card is named in this ruling.
- #2· Wizards of the Coast
If a spell you cast has
in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.No other card is named in this ruling.
- #3· Wizards of the Coast
If you cast a spell "without paying its mana cost," you can't choose to cast it for any alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, those must be paid to cast the spell.
No other card is named in this ruling.
Legal formats
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Meta decks with Buster Sword
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