Most played cards in B/G Aggro:

3 Decks
Treetop Village
12 copies - 4 average
Chameleon Colossus
12 copies - 4 average
Mutavault
12 copies - 4 average
Llanowar Wastes
11 copies - 3.67 average
Thoughtseize
9 copies - 3 average
Wren's Run Vanquisher
8 copies - 2.67 average
Kitchen Finks
8 copies - 2.67 average
Twilight Mire
8 copies - 2.67 average
Putrid Leech
8 copies - 2.67 average
Gilt-Leaf Palace
8 copies - 2.67 average
Imperious Perfect
8 copies - 2.67 average
Shriekmaw
7 copies - 2.33 average
Profane Command
7 copies - 2.33 average
Cloudthresher
7 copies - 2.33 average
Civic Wayfinder
6 copies - 2 average
Maelstrom Pulse
6 copies - 2 average
Terror
6 copies - 2 average
Garruk Wildspeaker
5 copies - 1.67 average
Loxodon Warhammer
5 copies - 1.67 average
Mind Stone
4 copies - 1.33 average