Bubbling Muck 
Sorcery
Until end of turn, whenever a player taps a Swamp for mana, that player adds an additional .
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL
Sorcery
Until end of turn, whenever a player taps a Swamp for mana, that player adds an additional .