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.
: 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.
