Details
Combo: Tainted Pact is a two-mana instant-speed Demonic Tutor with a catch: it exiles cards one at a time until you take one, and it stops dead at the second card with a name you have already seen. Keep the basics to one of each name, or accept that it usually digs through the top ten or so rather than the whole deck. Demonic Consultation is one mana for any card in the deck, but it exiles the top six plus everything above the card you name, so it is for the deck that either wins on the spot or does not care about its library; naming a card that is not in your deck exiles the whole library and wins with Thassa's Oracle. Bring to Light with five colors finds and casts for free anything up to mana value five: Kiki-Jiki, Doomsday, Tinker, Natural Order, Reanimate, Time Walk, Show and Tell, Balance. Waterlogged Teachings finds an instant or a flash card: Flash itself, Pestermite, Deceiver Exarch, Brain Freeze, Goryo's Vengeance, Shallow Grave. Tezzeret, Cruel Captain and Urza's Saga find the one-mana artifacts: Lion's Eye Diamond, Black Lotus, Sensei's Top, Skullclamp, Zuran Orb, both Spellbombs (Saga puts them straight into play). Eladamri's Call is Worldly Tutor to hand, at instant speed, for any creature: Kiki-Jiki, Thassa's Oracle, Griselbrand for the reanimator, or a persist creature. Imperial Recruiter finds Kiki-Jiki, Deceiver Exarch, Thassa's Oracle, Auriok Salvagers, Spike Feeder, Kinnan, Displacer Kitten and Walking Ballista. Recruiter of the Guard finds Kiki-Jiki, Pestermite, Kitchen Finks, Anafenza, Glen Elendra Archmage, Eternal Witness, Kinnan, Displacer Kitten and Walking Ballista. Trinket Mage finds the same one-mana artifacts as Saga. Tribute Mage finds Grim Monolith, Isochron Scepter, Thopter Foundry and Sword of the Meek. Spellseeker finds Chain of Smog, Entomb, Reanimate, Goryo's Vengeance, Ephemerate, Brain Freeze and Time Walk. Muddle the Mixture transmutes for Thassa's Oracle, Underworld Breach, Isochron Scepter, Oath of Druids, Animate Dead, Sword, Foundry and Grim Monolith. Enlightened Tutor finds Splinter Twin, Sneak Attack, Oath, Helm, Rest in Peace, Bolas's Citadel and Recurring Nightmare. Dimir House Guard transmutes for mana value four: Splinter Twin, Sneak Attack, Natural Order, Eureka, Tendrils of Agony, Helm of Obedience, Displacer Kitten, Auriok Salvagers, Luminous Broodmoth, Murderous Redcap, Glen Elendra Archmage, and its body is a free sacrifice outlet for the persist loop. Primeval Titan fetches Strip Mine, Karakas, Gaea's Cradle or Tolarian Academy onto the battlefield. Entomb and Unmarked Grave are the reanimator's tutors; Doomsday is the Oracle deck's. Ugin's ultimate finds every colorless nonland card and casts it free, Blightsteel included. Summoner's Bond is a drafted conspiracy that names two creatures, so casting one fetches the other: Kiki-Jiki and Deceiver Exarch, Kitchen Finks and Anafenza.
Result: Most two-card combos here are effectively one card plus a tutor.