
Whenever a player casts a spell, if no colored mana was spent to cast it, counter that spell.
Void Mirror has 5 printings, first in Modern Horizons 2 (2021). EDHREC ranks it #15,525 among Commander cards. It appears most in Mishra, Artificer Prodigy decks (367 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.