(Overgrown Heights isn't a spell.)
Overgrown Heights enters the battlefield tapped unless you reveal a multicolored card from your hand.
, : Scry 2.
: Add or to your mana pool.
Sacrifice Overgrown Heights: Add or to your mana pool.
, 
: Scry 2.: Add 
or 
to your mana pool. or to your mana pool.
