The Rock
An Extended deck, by Narling
4th 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/947051

Maindeck:

Artifacts
3 Chrome Mox (Not currently legal in Extended)

Creatures
4 Dark Confidant (Not currently legal in Extended)
2 Eternal Witness (Not currently legal in Extended)
3 Gatekeeper of Malakir
4 Kitchen Finks (Not currently legal in Extended)
4 Putrid Leech (Not currently legal in Extended)
4 Tarmogoyf (Not currently legal in Extended)

Instants
2 Putrefy

Legendary Artifacts
3 Umezawa's Jitte (Not currently legal in Extended)

Sorceries
1 Duress
2 Maelstrom Pulse (Not currently legal in Extended)
2 Profane Command (Not currently legal in Extended)
4 Thoughtseize (Not currently legal in Extended)

Basic Lands
2 Forest
3 Swamp

Lands
4 Overgrown Tomb
4 Treetop Village (Not currently legal in Extended)
4 Twilight Mire (Not currently legal in Extended)
4 Verdant Catacombs

Legendary Lands
1 Urborg, Tomb of Yawgmoth

Sideboard:
3 Damping Matrix (Not currently legal in Extended)
3 Extirpate (Not currently legal in Extended)
3 Ravenous Trap
2 Cranial Extraction (Not currently legal in Extended)
4 Deathmark