Frail Escarpment

({t}: Add {b} or {r} to your mana pool.)
Frail Escarpment enters the battlefield tapped.
When Frail Escarpment is put into a graveyard from the battlefield, you may search your library for a Swamp or Mountain card and put it onto the battlefield. If you do, shuffle your library.
"the depths of the earth shall swallow them... mountains shall cover them."
2 N 26:5