Mono-Black Devotion
A Standard deck, by Yuuya Watanabe
1st place at a tournament in Beijing, China on 2014-03-30
As reported at http://www.wizards.com/magic/magazine/article.aspx?x=mtg/daily/eventcoverage/gpbei14/welcome

Maindeck:

Creatures
4 Desecration Demon (Not currently legal in Standard)
4 Gray Merchant of Asphodel (Not currently legal in Standard)
4 Lifebane Zombie (Not currently legal in Standard)
4 Pack Rat (Not currently legal in Standard)

Enchantments
4 Underworld Connections (Not currently legal in Standard)

Instants
1 Bile Blight (Not currently legal in Standard)
4 Devour Flesh (Not currently legal in Standard)
4 Hero's Downfall (Not currently legal in Standard)
1 Ultimate Price (Not currently legal in Standard)

Sorceries
1 Duress
4 Thoughtseize (Not currently legal in Standard)

Basic Lands
19 Swamp

Lands
4 Mutavault (Not currently legal in Standard)
1 Temple of Deceit (Not currently legal in Standard)
1 Temple of Silence (Not currently legal in Standard)

Sideboard:
4 Staff of the Death Magus (Not currently legal in Standard)
1 Bile Blight (Not currently legal in Standard)
3 Doom Blade (Not currently legal in Standard)
2 Erebos, God of the Dead (Not currently legal in Standard)
3 Duress
2 Read the Bones (Not currently legal in Standard)