Windswept Seafloor enters the battlefield tapped unless you pay .
: Add or to your mana pool.
Sacrifice Windswept Seafloor: Add or to your mana pool.
, : Exile target artifact land, then return it to the battlefield under its owner's control.
.
: Add 
or 
to your mana pool. or to your mana pool.
, : Exile target artifact land, then return it to the battlefield under its owner's control.
