Dredge
An Extended deck, by Blaine Hatab
2nd place at a PT: San Juan PTQ Season tournament in Standish, Maine, United States on 2010-03-28
As reported at http://www.wizards.com/magic/magazine/article.aspx?x=mtg/daily/eventcoverage/sanjuan10ptq/0327standish

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)
4 Ideas Unbound (Not currently legal in Extended)
1 Life from the Loam (Not currently legal in Extended)

Basic Lands
2 Island

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

Sideboard:
1 Tarmogoyf (Not currently legal in Extended)
3 Ancient Grudge
3 Darkblast (Not currently legal in Extended)
4 Echoing Truth (Not currently legal in Extended)
4 Thoughtseize (Not currently legal in Extended)