Heartless BUG
Featured by AJ Kerrigan on 2013-05-12 (Standard)
As written about in http://www.starcitygames.com/php/news/article/26184.html

Maindeck:

Creatures
4 Acidic Slime (Not currently legal in Standard)
1 Aetherling (Not currently legal in Standard)
4 Borderland Ranger (Not currently legal in Standard)
2 Clone (Not currently legal in Standard)
1 Deadeye Navigator (Not currently legal in Standard)
4 Evil Twin (Not currently legal in Standard)
2 Progenitor Mimic (Not currently legal in Standard)
2 Sphinx of Uthuun (Not currently legal in Standard)
2 Sylvan Primordial (Not currently legal in Standard)
4 Thragtusk (Not currently legal in Standard)

Enchantments
4 Heartless Summoning (Not currently legal in Standard)

Instants
2 Putrefy (Not currently legal in Standard)

Sorceries
4 Farseek (Not currently legal in Standard)

Lands
4 Breeding Pool (Not currently legal in Standard)
4 Cavern of Souls (Not currently legal in Standard)
2 Drowned Catacomb (Not currently legal in Standard)
3 Hinterland Harbor (Not currently legal in Standard)
4 Overgrown Tomb (Not currently legal in Standard)
4 Watery Grave (Not currently legal in Standard)
3 Woodland Cemetery (Not currently legal in Standard)