: Search your library for a Island or Mountain card and put it onto the battlefield tapped. Shuffle your library, then put Coral Knoll on top of it.
, Sacrifice Coral Knoll: Add to your mana pool.
: Search your library for a Island or Mountain card and put it onto the battlefield tapped. Shuffle your library, then put Coral Knoll on top of it., Sacrifice Coral Knoll: Add 
to your mana pool.
