Chromium

Click here for visual deck (with images)
Click here for my EDH Commander decks
 
I tried to build an EDH deck specifically around each of the original Elder Dragons.
Chromium has Rampage: 2, which isn't a particularly useful ability. It's based around blocking, so I made the deck around "blocked" / "blocked by" abilities.
- When this creature is blocked, draw (or some other effect)
- Deathtouch / Exiletouch
- Choose how creatures block / Lure effects (only a few cards in B/U/W) / Provoke
- Can block any number of creatures
 
Mana Acceleration (12): General (1): Spells (25): Sideboard (Omitted/Cut card ideas):
1 Burnished Hart 1 Chromium 1 Akroma's Memorial 1 Harvester of Souls
1 Coalition Relic   1 Basilisk Collar 1 Teeka's Dragon
1 Commander's Sphere Creatures (26): 1 Dolmen Gate 1 Brine Hag
1 Darksteel Ingot 1 Breaker of Armies 1 Dragon Throne of Tarkir 1 Basalt Golem
1 Dreamstone Hedron 1 Ayli, Eternal Pilgrim 1 Gorgon's Head 1 Brigid, Hero of Kinsbaile
1 Gilded Lotus 1 Archetype of Finality 1 Grappling Hook 1 Rapid Fire
1 Hedron Archive 1 Instigator 1 Infiltration Lens 1 Coils of the Medusa
1 Magnifying Glass 1 Maddening Imp 1 Jabari's Banner 1 Mephidross Vampire
1 Mind Stone 1 Phage the Untouchable 1 Kusari-Gama 1 Quagmire Lamprey
1 Thran Dynamo 1 Pit Spawn 1 Magnetic Web 1 Catacomb Dragon
1 Unstable Obelisk 1 The Wretched 1 Neko-Te 1 Knight of Valor
1 Worn Powerstone 1 Chambered Nautilus 1 Nemesis Mask 1 Abu Ja'far
  1 Courtly Provocateur 1 Quietus Spike 1 Zombie Boa
Lands (36): 1 Drelnoch 1 Sword of Kaldra 1 Infernal Medusa
1 Underground Sea 1 Saprazzan Heir 1 Trial // Error 1 Konda, Lord of Eiganjo
1 Tundra 1 Slith Strider 1 Bident of Thassa 1 Sensei Golden-Tail
1 Scrubland 1 Stormsurge Kraken 1 Charisma 1 Necropolis Regent
1 Watery Grave 1 Tolarian Entrancer 1 Domineering Will 1 Knighthood
1 Hallowed Fountain 1 Vortex Elemental 1 Blaze of Glory 1 Silent Assassin
1 Godless Shrine 1 Avacyn, Angel of Hope 1 Entangler 1 Infinite Authority
1 Sunken Ruins 1 Avatar of Hope 1 Gideon Jura 1 Wall of Frost
1 Mystic Gate 1 Guardian of the Gateless 1 Godsend 1 Wall of Tears
1 Fetid Heath 1 Gustcloak Savior 1 Reconnaissance 1 Wall of Glare
1 Drowned Catacomb 1 Hundred-Handed One 1 True Conviction 1 Horrible Hordes
1 Glacial Fortress 1 Ironfist Crusher 1 Valor Made Real 1 Sparring Golem
1 Isolated Chapel 1 Masako the Humorless   1 Ichorclaw Myr
1 Arcane Sanctum 1 Odric, Master Tactician   1 Hunding Gjornersen
1 Command Tower 1 Palace Guard   1 Alaborn Zealot
1 Exotic Orchard 1 Rune-Tail, Kitsune Ascendant   1 Kaijin of the Vanishing Touch
1 Reflecting Pool     1 Labyrinth Minotaur
1 Vault of the Archangel     1 Vertigo Spawn
1 Windbrisk Heights     1 Loyal Sentry
6 Swamp     1 Dread Wight
5 Island     1 Bullwhip
6 Plains     1 Oracle en-Vec
1 Sol Ring     1 Shield of the Righteous