(: Add or to your mana pool.)
River Oasis enters the battlefield tapped unless you pay .
, , Sacrifice River Oasis: Return target creature you control to its owner's hand.
, : Put a +1/+1 counter on target creature.
: Add 
or 
to your mana pool.)., , Sacrifice River Oasis: Return target creature you control to its owner's hand.
, : Put a +1/+1 counter on target creature.
