Thopter Depths
An Extended deck, by Justin Meyer
2nd place at a PT: San Juan PTQ Season tournament in Minneapolis, Minnesota, United States on 2010-03-28
As reported at http://www.wizards.com/magic/magazine/article.aspx?x=mtg/daily/eventcoverage/sanjuan10ptq/0327minneapolis

Maindeck:

Artifacts
4 Chrome Mox (Not currently legal in Extended)
1 Engineered Explosives (Not currently legal in Extended)
2 Sword of the Meek (Not currently legal in Extended)
3 Thopter Foundry (Not currently legal in Extended)

Creatures
4 Dark Confidant (Not currently legal in Extended)
1 Gatekeeper of Malakir
4 Vampire Hexmage

Instants
4 Muddle the Mixture (Not currently legal in Extended)
1 Repeal (Not currently legal in Extended)
2 Smother
3 Thirst for Knowledge (Not currently legal in Extended)

Legendary Planeswalkers
2 Jace, the Mind Sculptor (Banned in Extended)

Sorceries
1 Compulsive Research (Not currently legal in Extended)
4 Thoughtseize (Not currently legal in Extended)

Basic Lands
2 Island
2 Swamp

Lands
1 Creeping Tar Pit
4 River of Tears (Not currently legal in Extended)
4 Sunken Ruins (Not currently legal in Extended)
2 Tolaria West (Not currently legal in Extended)

Legendary Lands
1 Academy Ruins (Not currently legal in Extended)
4 Urborg, Tomb of Yawgmoth

Legendary Snow Lands
4 Dark Depths (Not currently legal in Extended)

Sideboard:
1 Chalice of the Void (Not currently legal in Extended)
1 Gatekeeper of Malakir
1 Sphinx of Jwar Isle
3 Leyline of the Void
1 Echoing Truth (Not currently legal in Extended)
1 Jace, the Mind Sculptor (Banned in Extended)
2 Damnation (Not currently legal in Extended)
3 Deathmark
2 Duress