I've been having fun playing multiplayer EDH (otherwise known as "Commander") on MtGO in the casual room.
Here's the terrible, horrible, cheap-ass Red/Black deck I've been playing - that's also been winning.

As you'll see it's made up of mostly cheap-tic, underpowered spells. I have no idea how or why it's won.

Commander/General:

1 x Kaervek the Merciless

Creatures:

1 x Hellhole Rats
1 x Hollowborn Barghest
1 x Needle Specter
1 x Nezumi Shortfang
1 x Dusk Urchins
1 x Nezumi Graverobber
1 x Urborg Syphon-Mage
1 x Shambling Remains
1 x Mogg Maniac
1 x Lightning Reaver
1 x Kederekt Parasite
1 x Ashling the Pilgrim
1 x Malfegor
1 x Igneous Pouncer
1 x Phyrexian Rager
1 x Screeching Buzzard
1 x Lord of the Undead
1 x Lavaborn Muse
1 x Flameblast Dragon
1 x Stigma Lasher
1 x Singe-Mind Ogre
1 x Ebony Owl Netsuke
1 x Infectious Horror
1 x Hell's Thunder
1 x Golgari Thug
1 x Anathemancer
1 x Crypt Rats
1 x Shocker
1 x Stingscourger
1 x Greater Gargadon

Artifacts:

1 x Skullcage
1 x Paupers' Cage
1 x Relic of Progenitus
1 x Pyrite Spellbomb
1 x Misers' Cage
1 x Icy Manipulator
1 x Muse Vessel
1 x Ward of Bones
1 x Geth's Grimoire
1 x Farsight Mask

Enchantments:

1 x Pain Magnification
1 x Wound Reflection
1 x Everlasting Torment

Instants & Sorceries:

1 x Recover
1 x Inflame
1 x Syphon Soul
1 x Wheel of Fate
1 x Pyroclasm
1 x Inferno
1 x Flame Javelin
1 x Breath of Malfegor
1 x Sizzle
1 x Words of Waste
1 x Dark Suspicions
1 x Beseech the Queen
1 x Fiery Gambit
1 x Makeshift Mannequin
1 x Wildfire
1 x Nameless Inversion
1 x Reiterate
1 x Volcanic Fallout

Lands:

1 x Reflecting Pool
1 x Terramorphic Expanse
1 x Grixis Panorama
1 x Exotic Orchard
1 x Barren Moor
1 x Savage Lands
1 x Leechridden Swamp
1 x Jund Panorama
1 x Auntie's Hovel
1 x Tresserhorn Sinks
1 x Rakdos Carnarium
1 x Reliquary Tower
1 x Forgotten Cave
1 x Rupture Spire
12 x Mountain
12 x Swamp