
Add {B}{B}{B}.
Threshold — Add {B}{B}{B}{B}{B} instead if there are seven or more cards in your graveyard.
Cabal Ritual has 5 printings, first in Torment (2002). EDHREC ranks it #438 among Commander cards. It appears most in K'rrik, Son of Yawgmoth decks (10,266 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.