This Mill Control deck looks to lock down the board early game.
Control/Lockdown cards: Essence Scatter and Negate are used to keep your opponents at bay while you are looking for your pices. Shielded Aether Thief and if need be even Seeker of Insight can block creatures that got trough, Hostile Desert can also block (and usualy kill) creatures which might make it so that your opponents don't attack. You can also make them useless with an Aether Meltdown.
Mill: The mill cards such as Minister of Inquiries, Patient Rebuilding and Psychic Corrosion will be usefull troughout the game slowly lowering the amount of cards in the opponents library while you are looking for a copy of Fraying Sanity. Once Fraying Sanity is in play you can use your Ipnu Rivulet in combination with Dunes of the Dead and
Hostile Desert
to mill your opponent for 8 cards per desert. I would also advise to holld onto the card:Compelling Arguments or use their Cycle abilitie while you don't have a Fraying Sanity in play.
Mill-Finisher: Fleet Swallower is the only other finisher besides Fraying Sanity. If you can resolve a Fleet Swallower and attack with it (Note that the mill triggers on attack declaration, not combat damage) you should be able to finish your opponent off with the other mill cards in the deck.
Card Draw: Since we are looking for one card of which we only have 4 in the deck we need a lot of card draw (Yes we can also find Fleet Swallower but due to its cmc of 7 its not an option untill very late into the game). Glimmer of Genius is card selection and advantage but also gives us some Energy which is important for some of our other cards while card:Hieroglyphic Illuminations gives us the option to cycle it early if we are not hitting our land drops, likewise Compelling Argument can be cycled early game to find our land drops too. Shielded Aether Thief can give us some card draw tough this will take away some of our abilitie to mill our opponents since Minister of Inquiries uses the energy for mill. card:Seeker of Inights won't net us card advantage tough it does give us some nice selection if we've cast one of our counterspells, drawspells or even our Aether Meltdown tough I prefer to use this abilitie only on my oponents turns after it has blocked.
Energy Sub-Theme: The two card that use energy in the main-board are Minister of Inquiries and card:Seeker of Inisight. While they both produce energy you can get some extra energy via Aether Meltdown and Glimmer of Genius. You will have to make a choise weather you'll spend your energy for card advanntage and to posibly find your main pieces or weather you'll use them for mill.
tl;dr: Use controll and creatures with high toughness to survive while setting up your mill with Fraying Sanity. Card draw can bring your closer to your pieces and use your energy wisely.
Upgrades: I'm not sure of many upgrades, tough a Crucible of Worlds would be a great card to get your deserts back into play. Fleet Swallower also is quite the slow piece, so that might be the one you will take out if you've got a Crucible of Worlds
