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