I've been playing MTG since 7th Edition, but I'm new to Vintage (and these forums). All constructive criticism and feedback is appreciated.
This deck isn't going to be built IRL or in MTGO, it's to be used in
*free* online tournaments at
www.magic-league.com, partly because I simply couldn't at the moment afford to purchase this deck.
I remember something like this winning a tournament in the 2008... But that deck was TPS, so this isn't really related to that deck in any other way than all Vintage decks running blue are related to each other.
The deck concept is to minimize the amount of copies of each card in the deck while still keeping it operational to maximize the utility gained from Tainted Pact. Naturally, Vintage is the format to choose for such a deck since it's the only format with such a wide repertoire of restricted cards (Yes, I built this deck just to get to play Odyssey, my obsession in the game

) and I chose TezzeretVault.mwDeck because it's in many people's opinion the strongest deck around in the current format, maximizing my chance of actually creating something worth playing. Also, the stronger the combo the stronger the tutors become.
Due to some cards simply being too powerful to just play as a one-of, there are multiple cards with more than one instance of them in the deck. For example, with the Cunning Wish you're basically playing 4 FoWs with lesser chance to have your Tainted Pact fizzle (I also like the versatileness being able to tutor up a Mindbreak Trap, another tutor (

), a Hurkyl's Recall or a Ravenous Trap). I have thought of reducing the FoWs to 2 mainboard, if only I could find a decent replacement for that one copy. Three Tainted Pacts means your library will have
up to two of them during it's resolution. Should I remove one of them as well?
Most of the time you'll be finding Tezzeret with Pact, which is pretty convenient for a 2-drop instant. There are 3 Tezzerets to be able to fetch him with Intuition - another card that might need removing and the number of Tezzerets could be lowered to 2. Jace 2.0 I find to my liking, in a format with none of the pesky critters bashing his face he shines... I'm not removing him completely but I could consider making him a one-of if I could find a card to fill that slot.
Sphinx of the Steel wind or Inkwell Leviathan is mostly a vanity question, no-one plays Swords to Plowshares in Vintage. The protection gives him immunity to most kinds of artifact hate, and although he can be bounced more easily, the lifelink can prove useful especially if you're playing against Fish or Goblins.
The sideboard could propably be improved by taking out one Mindbreak Trap and all but one Ravenous Traps, if I had something more useful to put in there. With Merchant Scroll, Cunning Wish and Pacts you should have no problems finding them when you need them from either your deck after SB or the SB in game one.
Here's the current list (still very open to improvements):
// Lands (17)
1 Misty Rainforest
1 Flooded Strand
1 Scalding Tarn
1 Swamp
1 Underground Sea
1 Island
1 Polluted Delta
1 Underground River
1 River of Tears
1 Sunken Ruins
1 Darkwater Catacombs
1 Tolarian Academy
1 Seat of the Synod
1 Saprazzan Skerry
1 Gemstone Mine
1 Watery Grave
1 City of Brass
// Creatures (1)
1 [ARB] Sphinx of the Steel Wind
// Artifacts (12)
1 Black Lotus
1 Mana Crypt
1 Mox Jet
1 Mox Pearl
1 Mox Ruby
1 Mox Sapphire
1 Mox Emerald
1 Sensei's Divining Top
1 Sol Ring
1 Mana Vault
1 Voltaic Key
1 Time Vault
// Instants & Sorceries (25)
1 Chain of Vapor
1 Brainstorm
1 Ancestral Recall
1 Ponder
1 Spell Pierce
1 Demonic Tutor
3 Tainted Pact
1 Hurkyl's Recall
1 Impulse
1 Merchant Scroll
1 Time Walk
2 Mana Drain
1 Counterspell
1 Three Wishes
1 Yawgmoth's Will
1 Cunning Wish
1 Intuition
1 Tinker
1 Fact or Fiction
3 Force of Will
// Planeswalkers (5)
2 Jace, the Mind Sculptor
3 Tezzeret the Seeker
// Sideboard
SB: 2 Relic of Progenitus
SB: 1 Divert
SB: 1 Tainted Pact
SB: 1 Hurkyl's Recall
SB: 4 Energy Flux
SB: 2 Ravenous Trap
SB: 3 Mindbreak Trap
SB: 1 Force of Will
Before you get the flame wurs started, please remember this is the "Casual"-part of the forum.
Thanks for the answers and all suggestions in advance.

EDIT: Fixed an awkward typo.