River Ravine enters the battlefield tapped unless you pay 3 life.
: Add or to your mana pool.
Put River Ravine on top of your library: Add to your mana pool.
, Sacrifice River Ravine: River Ravine deals 1 damage to target creature or player.
: Add 
or 
to your mana pool.
to your mana pool. , Sacrifice River Ravine: River Ravine deals 1 damage to target creature or player.
