Mt. Tartarus

{t}: Add {r}.
{4}, {t}: Sacrifice Mt. Tartarus, search your library
for a Demon creature card, reveal it, then put it
into your hand, then shuffle your library.
An ancient Dwarven proverb says, "Beneath Mt.
Tartaus rests a great gold." However, some linguistics
claim that the word gold has been mistranslated.
"Gold" and "God" have a very similar spelling in
Ancient Dwarvish.