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$0.50 – $1.00
'This creature can't be blocked except by three or more creatures. Swampcycling {1} ({1}, Discard this card: Search your library for a Swamp card, reveal it, put it into your...
$0.50 – $1.00
'Protection from black
This creature gets +1/+1 for each Swamp your opponents control.
$0.25
'{B}: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.) Swampcycling {2} ({2},...
$0.25
'At the beginning of each player's upkeep, this enchantment deals damage to that player equal to the number of Swamps they control.
$7.50 – $8.75
{T}: Add {G}.
{T}: Add {B}. Activate only if you control a Swamp or a Forest.
$0.25 – $1.25
'Flying (This creature can't be blocked except by creatures with flying or reach.)
Nightmare's power and toughness are each equal to the number of Swamps you control.
$1.75 – $5.75
'If you control a Swamp, you may sacrifice a creature rather than pay this spell's mana cost.
Creatures you control get +2/+0 until end of turn.
$17.25 – $20.50
'{T}, Pay 1 life, Sacrifice this land: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.
$0.25 – $0.75
'As this land enters, you may reveal a Swamp or Forest card from your hand. If you don't, this land enters tapped.
{T}: Add {B} or {G}.
$0.25
'Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)