Cave Sea enters the battlefield tapped unless you control an enchantment.
: Add or to your mana pool.
Sacrifice Cave Sea: Add or to your mana pool.
: Cave Sea becomes a 2/2 blue Shapeshifter creature until end of turn. It's still a land.
: Add 
or 
to your mana pool. or to your mana pool.
: Cave Sea becomes a 2/2 blue Shapeshifter creature until end of turn. It's still a land.
