(: Add or to your mana pool.)
When River Crypt enters the battlefield, sacrifice it unless you pay .
, : Put a 1/1 blue Shapeshifter creature token with flying onto the battlefield.
, Sacrifice a Swamp: Add to your mana pool.
: Add 
or 
to your mana pool.).
, : Put a 1/1 blue Shapeshifter creature token with flying onto the battlefield., Sacrifice a Swamp: Add to your mana pool.
