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From $13.25
'({T}: Add {B} or {G}.)
As this land enters, you may pay 2 life. If you don't, it enters tapped.
$0.25
({T}: Add {B} or {R}.)
This land enters tapped unless you control two or more basic lands.
From $1.25
'Other Zombie creatures have swampwalk. (They can't be blocked as long as defending player controls a Swamp.)
Other Zombies have "{B}: Regenerate this permanent."
From $1.50
'{1}{B}, {T}, Sacrifice a creature: Search your library for a Zombie card and a Swamp card, reveal them, put them into your hand, then shuffle.