I recently aquired the Necron precon commander deck. Played it a couple of times, works pretty great out of the box. One of the better cards in the deck is Out of the Tombs. Really gives a great edge when your library is empty and you can just mess around with stuff in your graveyard. Of course, counterplays could be exiling the graveyard or destroying the enchantment when there are no more cards in your library, making you lose the game.
So I'm looking for ways to protect this enchantment. Give it hexproof/shroud, indestructible, protection from X etc. will all work fine. However, I cannot seem to find cards that do this in Mono Black or Colorless. Are there such cards?
Any help would be greatly appreciated.