Hidden Necropolis

Hidden Necropolis enters the battlefield tapped.
(T): Add (B).
(4) (B), (T), Sacrifice Hidden Necropolis: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland card with 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.)

#0275