Spell Snare 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
Counter target spell with mana value 2.
Complete guide
Spell Snare is a powerful blue instant that provides incredibly efficient interaction for just one mana. While its targeting range is narrow, it excels at stopping many of the most impactful early-game plays in Magic: The Gathering. Mastering this card requires a solid understanding of how mana values are calculated on the stack.
Defining Mana Value
Spell Snare targets a spell with a mana value of exactly 2. The mana value is determined by the total amount of mana in the upper right corner of the card, regardless of how much mana was actually paid to cast it. For example, a spell cast for an alternative cost or a reduced cost still retains its original mana value.
Resolution Step-by-Step
First, your opponent casts a spell. You check its mana value; if it is exactly 2, you may cast Spell Snare targeting it. When Spell Snare resolves, it checks if the target is still legal. If the mana value is still 2, the target spell is countered and moved from the stack to its owner's graveyard. If the spell has been moved or become illegal, Spell Snare simply fails to resolve.
Common Mistakes
A frequent error involves 'X' spells. While on the stack, the mana value of a spell with {X} in its cost includes the value chosen for X. Therefore, Spell Snare can only counter an 'X' spell if X was chosen such that the total cost equals 2. Additionally, remember that Spell Snare cannot target spells with mana values of 0, 1, or 3+; it is strictly limited to 2.
When to Play It
Spell Snare is best utilized in formats where two-mana spells define the pace of the game. Because it only costs one blue mana, it allows you to remain mana-efficient while disrupting your opponent's curve. It is an excellent defensive tool to protect your board state or to stop a pivotal engine piece from hitting the battlefield.
Interaction examples
Your opponent casts Counterspell, which has a mana cost of {U}{U}. This gives it a mana value of 2. You can cast Spell Snare targeting Counterspell. Spell Snare will resolve, countering the Counterspell and sending it to the graveyard before it can stop your own plays.
If your opponent attempts to counter one of your spells with An Offer You Can't Refuse, you cannot use Spell Snare to stop them. An Offer You Can't Refuse has a mana cost of {U}, meaning its mana value is 1. Since Spell Snare requires a target with a mana value of exactly 2, it is not a legal response in this scenario.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Spell Snare
Original English text — Wizards of the Coast / Scryfall
No additional ruling has been published for this card.
Legal formats
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Meta decks with Spell Snare
No archived Top 8 deck with this card yet.



Counterspell
An Offer You Can't Refuse