Void Mirror 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 a player casts a spell, if no colored mana was spent to cast it, counter that spell.
Complete guide
Void Mirror is a powerful artifact that punishes players for attempting to cast spells without using colored mana. It serves as a strict gatekeeper against colorless strategies and free spells, ensuring that every cast has a prismatic cost. Whether you are facing down ancient Eldrazi or zero-cost artifacts, this mirror reflects only those who pay their dues in color.
What Void Mirror Does
Void Mirror has a triggered ability that checks every spell cast by any player. It specifically looks at the mana spent to cast that spell. If the total mana spent includes only colorless mana, or if no mana was spent at all (such as with 'without paying its mana cost' effects), the spell is countered upon resolution of the Mirror's trigger.
Resolution Step-by-Step
First, a player casts a spell and pays its costs. Second, Void Mirror's ability checks if any colored mana was spent; if none was, the ability triggers and goes on the stack above the spell. Finally, when the trigger resolves, it counters the original spell. This means even 'uncounterable' spells are targeted by the trigger, though they will not be countered if they explicitly state they 'can't be countered'.
Common Mistakes and Misconceptions
A common mistake is thinking Void Mirror only affects colorless spells. It actually affects any spell—even a red spell—if you used only colorless mana to cast it (for example, via an effect that reduces costs or generates colorless mana). Additionally, remember that mana produced by sources like basic Wastes is colorless and will not satisfy the Mirror's requirement for colored mana.
Interaction examples
Sol RingIf you have Void Mirror on the battlefield and your opponent attempts to cast Sol Ring using only generic mana from a land that produces colorless mana, the Void Mirror triggers. Since no colored mana was spent, the Sol Ring is countered as soon as the trigger resolves.
Arcane SignetYou want to cast a spell while Void Mirror is out. If you use Arcane Signet to produce a single mana of any color (such as Blue) and use that mana as part of the spell's cost, Void Mirror will check the spell, see that colored mana was spent, and the trigger will not counter the spell.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Void Mirror
Original English text — Wizards of the Coast / Scryfall
No additional ruling has been published for this card.
Popular combos
Real combos played by the community, sorted by popularity.
Void Mirror + Possibility Storm
- 1Whenever a player casts a spell from their hand, Possibility Storm triggers, exiling the spell and allowing the player to reveal cards from the top of their library until they reveal a spell that shares a type with the exiled spell, and cast it without paying its mana cost.
- 2If the player chooses to cast the spell, Void Mirror triggers, countering that spell since no colored mana was spent to cast it.
Void Mirror + Knowledge Pool
- 1Whenever a player casts a spell from their hand, Knowledge Pool triggers, exiling the spell and allowing the player to cast another card exiled by Knowledge Pool without paying its mana cost.
- 2If the player chooses to cast a spell, Void Mirror triggers, countering that spell since no colored mana was spent to cast it.
Omen Machine + Void Mirror
- 1At the beginning of each draw step, Omen Machine prevents the active player from drawing a card, and causes them to exile the top card of their library, and cast that card if its a spell without paying its mana cost, or put it onto the battlefield if it's a land.
- 2If an opponent casts a spell this way, Void Mirror triggers, countering that spell.
Noctis, Prince of Lucis + Aetherflux Reservoir + Void Mirror
- 1Cast the artifact from your graveyard by paying
and 3 life. - 2Aetherflux Reservoir and Void Mirror trigger.
- 3Resolve the Aetherflux Reservoir trigger, causing you to gain 1 life for each spell you've cast this turn.
- 4Resolve the Void Mirror trigger, countering the artifact spell and returning it to your graveyard.
- 5Repeat
Guile + Void Mirror
- 1Cast any spell using only colorless mana.
- 2Void Mirror triggers, exiling the spell and casting it from exile without paying its mana cost.
- 3Repeat from step 2.
Eye of the Storm + Void Mirror
- 1Whenever a player casts an instant or sorcery spell, Eye of the Storm triggers, exiling that spell and allowing the player to copy each spell exiled by Eye of the Storm and cast them from exile.
- 2When the player casts the copies made by Eye of the Storm, Void Mirror triggers, countering those copies.
Legal formats
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Meta decks with Void Mirror
No archived Top 8 deck with this card yet.