River Swamp enters the battlefield tapped.
: Add to your mana pool. Activate this ability only if you control an Island.
: Add to your mana pool. Activate this ability only if you control a Swamp.
, Sacrifice River Swamp: Add to your mana pool.
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: Add 
to your mana pool. Activate this ability only if you control an Island.
to your mana pool. Activate this ability only if you control a Swamp.
to your mana pool.
