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From $1.00
'This land enters tapped unless you control a Mountain or a Forest.
{T}: Add {R} or {G}.
From $4.75
'This land enters tapped unless you control an Island or a Mountain.
{T}: Add {U} or {R}.
From $6.75
'{T}: Add {B}.
{T}: Add {R}. Activate only if you control a Swamp or a Mountain.
From $7.00
({T}: Add {B} or {R}.)
As this land enters, you may pay 2 life. If you don't, it enters tapped.
From $0.25
'As this land enters, you may reveal a Swamp or Mountain card from your hand. If you don't, this land enters tapped.
{T}: Add {B} or {R}.
From $4.50
'This land enters tapped unless you control a Mountain or a Forest.
{T}: Add {R} or {G}.
From $1.00
'This creature gets +1/+1 as long as you control a Mountain.
This creature gets +1/+1 as long as you control a Plains.
From $1.00
'Haste
As long as this card is in your graveyard and you control a Mountain, creatures you control have haste.
$0.25
'{T}: Add {C}.
{1}, {T}, Sacrifice this land: Search your library for a basic Swamp, Mountain, or Forest card, put it onto the battlefield tapped, then shuffle.
From $8.25
This land enters tapped unless you control a Mountain or a Forest.
{T}: Add {U}.
{U}, {T}: The next spell you cast this turn can't be countered.