Psychatog
An Extended deck, by Adam Prosak
1st place at a Pro Tour: Honolulu tournament in Columbus, Ohio, United States on 2005-11-13
As reported at http://www.professional-events.com/decks/WotC/PTQ%20Honolulu05/PTQHonolulu05111205.htm

Maindeck:

Artifacts
2 Scrabbling Claws (Not currently legal in Extended)

Creatures
4 Psychatog (Not currently legal in Extended)

Instants
4 Circular Logic (Not currently legal in Extended)
4 Counterspell (Not currently legal in Extended)
4 Fact or Fiction (Not currently legal in Extended)
4 Force Spike (Not currently legal in Extended)
2 Mana Leak
3 Opt (Not currently legal in Extended)
3 Smother
4 Thirst for Knowledge (Not currently legal in Extended)

Legendary Creatures
2 Meloku the Clouded Mirror (Not currently legal in Extended)

Artifact Lands
4 Seat of the Synod (Not currently legal in Extended)

Basic Lands
7 Island
2 Swamp

Lands
1 Cephalid Coliseum (Not currently legal in Extended)
4 Polluted Delta (Not currently legal in Extended)
2 Stalking Stones (Not currently legal in Extended)
3 Watery Grave

Legendary Lands
1 Oboro, Palace in the Clouds (Not currently legal in Extended)

Sideboard:
2 Engineered Explosives (Not currently legal in Extended)
1 Scrabbling Claws (Not currently legal in Extended)
2 Darkblast (Not currently legal in Extended)
4 Ghastly Demise (Not currently legal in Extended)
2 Llawan, Cephalid Empress (Not currently legal in Extended)
4 Duress