(Waterveil Barrens isn't a spell.)
Waterveil Barrens enters the battlefield tapped unless you pay .
, : Scry 2.
: Add or to your mana pool.
Sacrifice Waterveil Barrens: Add or to your mana pool.
.
, 
: Scry 2.: Add 
or 
to your mana pool. or to your mana pool.
