(: Add or to your mana pool.)
When Grave River enters the battlefield, you lose 1 life unless you reveal a Blue card from your hand.
: Grave River becomes a 2/2 blue Crab creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
: Grave River becomes a 2/2 blue Crab creature until end of turn. It's still a land.
