
Until end of turn, whenever a player taps a Swamp for mana, that player adds an additional {B}.
Bubbling Muck has 2 printings, first in Urza's Destiny (1999). EDHREC ranks it #2,199 among Commander cards. It appears most in K'rrik, Son of Yawgmoth decks (4,576 on EDHREC). It has 2 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.