(Coral Cradle isn't a spell.)
Coral Cradle enters the battlefield tapped unless you reveal a Treefolk card from your hand.
Sacrifice a land: You gain 1 life.
: Add or to your mana pool.
Put Coral Cradle on top of your library: Add to your mana pool.
: Add 
or 
to your mana pool.
to your mana pool. 
