(: Add or to your mana pool.)
River Mountain enters the battlefield tapped unless you pay .
, : Target land becomes a 3/3 blue Merfolk creature until end of turn. It's still a land.
, : River Mountain deals 1 damage to target creature.
: Add 
or 
to your mana pool.).
, : Target land becomes a 3/3 blue Merfolk creature until end of turn. It's still a land., : River Mountain deals 1 damage to target creature.
