When Watery Plain enters the battlefield, sacrifice it unless you pay .
, : Add , or to your mana pool.
: Watery Plain becomes a 2/2 blue Cephalid Shapeshifter creature until end of turn. It's still a land.
.
, 
: Add , 
or to your mana pool.
: Watery Plain becomes a 2/2 blue Cephalid Shapeshifter creature until end of turn. It's still a land.
