(Seachrome Wreckage isn't a spell.)
Seachrome Wreckage enters the battlefield tapped unless you control an enchantment.
Sacrifice a land: You gain 1 life.
: Add or to your mana pool.
Sacrifice Seachrome Wreckage: Add or to your mana pool.
: Add 
or 
to your mana pool. or to your mana pool.
