(Steppe Atoll isn't a spell.)
Steppe Atoll enters the battlefield tapped unless you control three or more artifact creatures.
, : Scry 2.
: Add or to your mana pool.
Sacrifice Steppe Atoll: Add or to your mana pool.
, 
: Scry 2.: Add 
or 
to your mana pool. or to your mana pool.
