U/B/W Control
A Time Spiral Block deck, by Mark Herberholz
3rd place at a tournament in Yokohama, Japan on 2007-04-22
As reported at http://www.wizards.com/default.asp?x=mtgevent/ptyok07/t50decks

Maindeck:

Artifacts
4 Prismatic Lens

Creatures
2 Aeon Chronicler
2 Draining Whelk

Enchantments
1 Teferi's Moat
1 Temporal Isolation

Instants
4 Cancel
3 Careful Consideration
1 Disenchant
1 Extirpate
1 Haunting Hymn
3 Mystical Teachings
1 Pull from Eternity
2 Sudden Death
2 Tendrils of Corruption

Legendary Creatures
1 Teferi, Mage of Zhalfir

Sorceries
4 Damnation

Basic Lands
8 Island
1 Plains
3 Swamp

Lands
2 Calciform Pools
4 Dreadship Reef
4 Terramorphic Expanse
2 Urza's Factory

Legendary Lands
3 Urborg, Tomb of Yawgmoth

Sideboard:
2 Detritivore
2 Magus of the Tabernacle
1 Teferi's Moat
1 Careful Consideration
1 Dismal Failure
2 Extirpate
1 Mystical Teachings
1 Pull from Eternity
2 Tendrils of Corruption
1 Mountain
1 Urborg, Tomb of Yawgmoth