Watery Marsh enters the battlefield tapped unless you control an enchantment.
: Add or to your mana pool.
Sacrifice Watery Marsh: 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.
