(Dry Ruins isn't a spell.)
Dry Ruins enters the battlefield tapped.
, : Scry 2.
, Pay 1 life: Add or to your mana pool.
, , Sacrifice Dry Ruins: Draw a card.
, 
: Scry 2., Pay 1 life: Add 
or 
to your mana pool., , Sacrifice Dry Ruins: Draw a card.
