(: Add or to your mana pool.)
Mountain River enters the battlefield tapped.
, : Target land becomes a 2/2 red Troll creature until end of turn. It's still a land.
, , Sacrifice Mountain River: Return target creature you control to its owner's hand.
: Add 
or 
to your mana pool.)
, : Target land becomes a 2/2 red Troll creature until end of turn. It's still a land., , Sacrifice Mountain River: Return target creature you control to its owner's hand.
