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If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.
'All Swamps are 1/1 black creatures that are still lands.
'Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
'Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
'{T}, Pay 1 life, Sacrifice this land: Search your library for a Swamp or Forest card, put it onto the battlefield, then shuffle.
'Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
'If an opponent controls a Plains and you control a Swamp, you may cast this spell without paying its mana cost.
All creatures get -2/-2 until end of turn.
'Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) As long as this card is in your graveyard and you control a Swamp, creatures you...
'If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.
'[+1]: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle. [−3]: Target creature gets +X/+X or -X/-X until end of turn, where X...
'{T}, Sacrifice a creature and a Swamp: Destroy target nonartifact creature. It can't be regenerated.
{T}, Sacrifice a creature and a snow Swamp: Destroy target creature. It can't be regenerated.
'{T}, Pay 1 life, Sacrifice this land: Search your library for a Swamp or Forest card, put it onto the battlefield, then shuffle.