(Murmuring Foothills isn't a spell.)

When Murmuring Foothills enters the battlefield, you lose 2 life unless you reveal an artifact card from your hand.

Whenever a card is put into a graveyard from anywhere, exile that card.

, Pay 1 life, Sacrifice Murmuring Foothills: Search your library for a Swamp or Mountain card and put it onto the battlefield, then shuffle your library.