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Guiding Voice has 1 printing, first in Strixhaven: School of Mages (2021). EDHREC ranks it #24,111 among Commander cards. It appears most in Mavinda, Students' Advocate decks (40 on EDHREC). It has 4 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.