When Reef Cradle enters the battlefield, sacrifice it unless you pay .
, : Add to your mana pool.
: Reef Cradle becomes a 2/2 green Leech creature until end of turn. It's still a land.
.
, 
: Add to your mana pool., : Add to your mana pool.
: Reef Cradle becomes a 2/2 green Leech creature until end of turn. It's still a land.
