(Crag Flagstones isn't a spell.)
Crag Flagstones enters the battlefield tapped unless you control two or more creatures.
, : Tap target artifact with converted mana cost X or less.
, : Add to your mana pool.
, 
: Tap target artifact with converted mana cost X or less.
, : Add 
to your mana pool., : Add to your mana pool.
