Void Mirror

{2} · Artifact · from $0.39

Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell.

Format legality

Grixis Reanimator (Legacy, 2.0% of the meta): 4 in the sideboard of 1% of lists
Golgari Cradle Control (Legacy, 1.4% of the meta): 3 in the sideboard of 5% of lists
Painter (Legacy, 0.7% of the meta): 1 in the sideboard of 12% of lists
4c Cradle Control (Legacy, 0.7% of the meta): 3 in the sideboard of 11% of lists
Smallpox (Legacy, 0.6% of the meta): 2 in the sideboard of 5% of lists
Black Eldrazi (Modern, 0.4% of the meta): 1 in the sideboard of 3% of lists
Mono-Black Midrange (Legacy, 0.3% of the meta): 2 in the sideboard of 14% of lists
Golgari Nic Fit (Legacy, 0.1% of the meta): 1 in the sideboard of 33% of lists
Selesnya Cradle Control (Legacy, 0.1% of the meta): 1 in the sideboard of 20% of lists