Milos, Volcanic Field

Milos, Volcanic Field enters the battlefield tapped.

{t}: Add {r}

{4}{r}, {t}, Sacrifice Milos, Volcanic Field: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland cardwith mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)