Dredge
An Extended deck, by Vagner Casatti
5th place at a PT: San Juan PTQ Season tournament in Magic Online, United States on 2010-02-14
As reported at http://www.wizards.com/Magic/Digital/MagicOnlineTourn.aspx?x=mtg/digital/magiconline/tourn/947048

Maindeck:

Creatures
3 Bloodghast
4 Drowned Rusalka (Not currently legal in Extended)
1 Flame-Kin Zealot (Not currently legal in Extended)
4 Golgari Grave-Troll (Not currently legal in Extended)
4 Hedron Crab
4 Narcomoeba (Not currently legal in Extended)
1 Sphinx of Lost Truths
4 Stinkweed Imp (Not currently legal in Extended)

Enchantments
4 Bridge from Below (Not currently legal in Extended)

Legendary Creatures
1 Iona, Shield of Emeria

Sorceries
3 Dread Return (Not currently legal in Extended)
3 Glimpse the Unthinkable (Not currently legal in Extended)
3 Ideas Unbound (Not currently legal in Extended)
2 Life from the Loam (Not currently legal in Extended)

Basic Lands
2 Island

Lands
2 Breeding Pool
4 Misty Rainforest
3 Scalding Tarn
1 Steam Vents
3 Verdant Catacombs
3 Watery Grave

Land Creatures
1 Dryad Arbor (Not currently legal in Extended)

Sideboard:
3 Ancient Grudge
3 Darkblast (Not currently legal in Extended)
3 Echoing Truth (Not currently legal in Extended)
1 Iona, Shield of Emeria
2 Duress
3 Thoughtseize (Not currently legal in Extended)