Planeswalkers

Every Planeswalker (as of Dark Ascension).
This deck is constantly changing as new Planeswalkers are added, as it tries to give each Planeswalker something to do.
So I have Dragons for Sarkhan the Mad, Artifacts for Tezzeret, Elves for Nissa, Red spells for Chandra Ablaze, etc.
Eventually this deck will become impossible, but for now it's doable.

General (1):
Scion of the Ur-Dragon

Planeswalkers (27):
Karn Liberated Ajani Vengeant Garruk Relentless Nicol Bolas, Planeswalker Sarkhan the Mad Sarkhan Vol Sorin, Lord of Innistrad Tezzeret, Agent of Bolas Venser, the Sojourner Liliana of the Veil Liliana Vess Sorin Markov Jace Beleren Jace, Memory Adept Jace, the Mind Sculptor Tezzeret the Seeker Garruk Wildspeaker Garruk, Primal Hunter Nissa Revane Chandra Ablaze Chandra Nalaar Chandra, the Firebrand Koth of the Hammer Ajani Goldmane Elspeth Tirel Elspeth, Knight-Errant Gideon Jura

Creatures (14):
Mindless Automaton Dragon Broodmother Gilder Bairn Intet, the Dreamer Niv-Mizzet, the Firemind Rhys the Redeemed Rith, the Awakener Teneb, the Harvester Viral Drake Oracle of Mul Daya Nissa's Chosen Dragon Mage Moonveil Dragon Taurean Mauler

Spells (15):
Mind's Eye Contagion Clasp Contagion Engine Lux Cannon Magistrate's Scepter Rings of Brighthearth Temporal Aperture Conflux Decimate Maelstrom Nexus Violent Ultimatum Clockspinning Inexorable Tide Doubling Season Norn's Annex

Mana Acceleration (7):
Coalition Relic Fellwar Stone Gilded Lotus Thran Dynamo Mirari's Wake Argothian Elder Bloom Tender