Heartless BUG
Featured by Michael Martin on 2011-10-09 (Standard)
As written about in http://www.starcitygames.com/php/news/article/22866.html

Maindeck:

Artifact Creatures
3 Perilous Myr (Not currently legal in Standard)
4 Solemn Simulacrum (Not currently legal in Standard)

Creatures
3 Acidic Slime (Not currently legal in Standard)
3 Consecrated Sphinx (Not currently legal in Standard)
1 Garruk's Horde (Not currently legal in Standard)
1 Phantasmal Image (Not currently legal in Standard)
2 Phyrexian Rager (Not currently legal in Standard)
1 Rune-Scarred Demon (Not currently legal in Standard)
2 Skinrender (Not currently legal in Standard)
4 Viridian Emissary (Not currently legal in Standard)

Enchantments
4 Heartless Summoning (Not currently legal in Standard)

Instants
3 Mana Leak (Not currently legal in Standard)

Legendary Creatures
2 Glissa, the Traitor (Not currently legal in Standard)

Sorceries
2 Rampant Growth (Not currently legal in Standard)

Basic Lands
4 Forest
2 Island
4 Swamp

Lands
4 Darkslick Shores (Not currently legal in Standard)
2 Drowned Catacomb (Not currently legal in Standard)
4 Hinterland Harbor (Not currently legal in Standard)
4 Woodland Cemetery (Not currently legal in Standard)