A few life and who wouldnt want to trade life points for mana
Pieces like Distended Mindbender, Drownyard Behemoth, Lashweed Lurker, and Emrakul, the Promised End all capture the essence of the creatures in The Mist
Unfortunately, it doesnt particularly have an understanding that more mana can create more powerful effects, even though it does know that more powerful cards do have larger mana costs
Playing with a plan of tutoring up Cabal Coffers and Urborg, Tomb of Yawgmoth isn't very on-theme, but it does help cast my commander and pouring big mana into an Exsanguinate or Torment of Hailfire seems like something Sauron might do
In these kinds of decks, you should almost always play cards from there, have ways to manipulate the top of your library, or shuffle it