U/W/R Changelings
Featured by Michael Martin on 2014-07-18 (Modern)
As written about in http://www.starcitygames.com/php/news/article/28957.html

Maindeck:

Creatures
4 Amoeboid Changeling
4 Fire-Belly Changeling
3 Galerider Sliver
4 Lord of the Unreal
4 Mirror Entity
4 Mothdust Changeling
1 Phantasmal Image
1 Shadow Sliver
4 Shapesharer
3 Thundercloud Shaman

Enchantments
4 Crucible of Fire

Lands
4 Ancient Amphitheater
4 Cavern of Souls
2 Gemstone Mine (Not currently legal in Modern)
4 Mana Confluence
4 Mutavault
2 Reflecting Pool
4 Wanderwine Hub

Sideboard:
4 Goblin King
4 Knight Exemplar
4 Lord of Atlantis (Not currently legal in Modern)
3 Ore Gorger