(Leechridden Palace isn't a spell.)
Leechridden Palace enters the battlefield tapped unless you control one or more creatures.
, : Scry 2.
: Add or to your mana pool.
Put Leechridden Palace on top of your library: Add to your mana pool.
, 
: Scry 2.: Add 
or 
to your mana pool. to your mana pool. 
