Show Only Guru Approved Combos
Search to DeathAven Mindcensor Buy + Ob Nixilis, Unshackled Buy + Maralen of the Mornsong Buy
Forces opponents to search their library... oh wait only the top four cards for an answer only a few triggers should be necessary to kill all opponents.
D&D, Part 2 (Dredge and Delve: Dead Ringers)Mirror-Mad Phantasm Buy + Mortal Combat Buy + Clone Buy
Get all 3 out, with Clone copying Phantasm.
Then, in response to the upkeep trigger, activate the clone's version of the ability.
(EDIT: Activation of Clone's ability must be done at the previous opponents end step.)
After running out of cards, upkeep will continue and the triggered event will resolve appropriately, getting you the win.
Any clone, or token copy of Phantasm, will work, but the trick is to only have one legitimate Mirror-Mad in the deck so you don't hit another one.
The hunt for zombiesSage's Row Denizen Buy + Undead Alchemist Buy + Whim of Volrath Buy
Change sage's ability to say black.Mill the opponent and watch alchemist go crazy. Only works well if opponet has enough creatures. Did not know what theme this is so no drawback is my pick.
Kira's AbyssMagus of the Abyss Buy + Kira, Great Glass-Spinner Buy
Have kira and magus in play. Opponents lose a creatur per upkeep but kira counters magus' ability.
D&D (Dredge and Delve)Prophet of Kruphix Buy + Mesmeric Orb Buy
Many uses of these two interacting.
Of course, Prophet can be swapped for Seedborn Muse Buy.
Vulturous Zombie... Big Bird.
Sidisi 1.0.... lots of zombies.
Pedantic Learning... draw cards.
Dirty Birds (At What Price, Greatness?)Ruric Thar, the Unbowed Buy + Phyresis Buy + Melira, Sylvok Outcast Buy
Phyresis can be swapped out for Grafted Exoskeleton.
Net result: You cast spells. They don't.
Blast RadiusHornet Nest Buy + Blasphemous Act Buy + Purphoros, God of the Forge Buy
Feel free to use damage doublers to spike the damage out of control.
Krenko's DominionSkirk Prospector Buy + Krenko, Mob Boss Buy + Aura of Dominion Buy
Turn 1: skirk prospector
Turn 2: (with mana accel) krenko,mob boss
Turn 3: enchant krenko with aura of dominion
Herpitus... Derpitus...Regrowth Buy + Cast Through Time Buy + Recollect Buy
Each one returns the other.
And the rest of your stuff as well.
Other interactions in the past may have returned instants and sorceries, but this returns everything.
Break the BankNissa, Worldwaker Buy + The Chain Veil Buy + Ral Zarek Buy
First, play all 3.
Then, activate Nissa's second +1 ability.
Then, use Ral Zarek's +1 ability.
Net result: Infinite activation of your planeswalkers AND mass land ramp.
Add Prismatic Omen if desired to make life easier.
Credit to kosolax, who came up with a combo previously using the chain veil...
EDIT: Ral Zarek swapped in for Tezzy 1.0. Ral acts as his own win con. Credit to P_E for pointing this out.