When Salt River enters the battlefield, sacrifice it unless you pay .
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
: Salt River becomes a 2/2 black Rat Cleric creature until end of turn. It's still a land.
.
: Add 
to your mana pool. If you played a land this turn, Add to your mana pool instead.
: Salt River becomes a 2/2 black Rat Cleric creature until end of turn. It's still a land.
