U/B Teachings
A Time Spiral Block deck, by DJ Kastner
7th place at a Pro Tour: Valencia tournament in Columbus, Ohio, United States on 2007-07-08
As reported at http://www.wizards.com/default.asp?x=mtgevent/valencia07ptq/0707columbus

Maindeck:

Artifacts
4 Coalition Relic
4 Prismatic Lens

Creatures
1 Bogardan Hellkite
4 Shadowmage Infiltrator

Enchantments
3 Take Possession
1 Temporal Isolation

Instants
4 Careful Consideration
1 Haunting Hymn
1 Imp's Mischief
3 Mystical Teachings
1 Pact of Negation
1 Slaughter Pact
2 Tendrils of Corruption

Sorceries
4 Damnation

Basic Lands
4 Island
1 Plains
1 Swamp

Lands
2 Calciform Pools
1 Dreadship Reef
4 River of Tears
4 Terramorphic Expanse
3 Tolaria West
2 Urza's Factory
1 Vesuva

Legendary Lands
3 Urborg, Tomb of Yawgmoth

Sideboard:
2 Temporal Isolation
1 Disenchant
1 Haunting Hymn
2 Imp's Mischief
1 Pull from Eternity
2 Return to Dust
2 Slaughter Pact
1 Strangling Soot
1 Tendrils of Corruption