Sea Delta enters the battlefield tapped unless you pay .
: Add or to your mana pool.
Put Sea Delta on top of your library: Add to your mana pool.
: Sea Delta becomes a 2/1 blue and black Merfolk creature until end of turn. It's still a land.
.
: Add 
or to your mana pool.
to your mana pool. : Sea Delta becomes a 2/1 blue and black Merfolk creature until end of turn. It's still a land.
