(Sandy Valley isn't a spell.)
When Sandy Valley enters the battlefield, sacrifice it unless you pay 1 life.
, : Tap target artifact with converted mana cost X or less.
: Add to your mana pool. Sandy Valley doesn't untap during your next untap step.
, 
: Tap target artifact with converted mana cost X or less.: Add 
to your mana pool. Sandy Valley doesn't untap during your next untap step.
