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