(Scab-Bog isn't a spell.)
Scab-Bog enters the battlefield tapped.
, : Scry 2.
, Pay 1 life, Sacrifice Scab-Bog: Search your library for a Swamp or Mountain card and put it onto the battlefield, then shuffle your library.
, 
: Scry 2., Pay 1 life, Sacrifice Scab-Bog: Search your library for a Swamp or Mountain card and put it onto the battlefield, then shuffle your library.
