(Elfhame Ruins isn't a spell.)

When Elfhame Ruins enters the battlefield, you lose 2 life unless you reveal a land card from your hand.

Elfhame Ruins is indestructible. (Destroy effects and lethal damage don't destroy it.)

When Elfhame Ruins enters the battlefield, put a land you control on the bottom of its owner's library.

: Add  to your mana pool.