Most casual decks will not contain these cards. But that's a minor issue. If you made this deck to beat the Orgg's deck, then fine. No one else will play you, though, becuase many of these cards were restricted for a very good reason. While I don't think that Necropotence deserves to be restricted unless you're playing Trix, the other restricted cards are restricted for a good reason.
The major reason why it's a big deal is that you asked other members to make suggestions in making the deck better. A lot of people won't want to suggest anything concrete becuase they shy away from broken deck lists like this. Even though this broken deck can be made even more broken (such as suggestion for Dark Rituals), I think that decks like this pverstep the boundaries of asking for criticism.
Nevertheless, despite my reservations... Take out two of the Sol Rings, and all 4 Libraries of Leng. Sub in 4 Dark Rituals and 2 Demonic Consultations. Replace the Terrors with either Dark Banishing or Snuff Out. Take out 2 Hypnotic Specters and add 2 Yawgmoth's Will. This will allow you to combo your Dark Rituals and Lotuses into a massive Drain Life for over 20 damage.