Most played cards in Goblins:

5 Decks
Goblin Balloon Brigade
20 copies - 4 average
Chain Lightning
20 copies - 4 average
Lightning Bolt
20 copies - 4 average
Goblin Digging Team
17 copies - 3.4 average
Red Elemental Blast
17 copies - 3.4 average
Goblins of the Flarg
16 copies - 3.2 average
Goblin Grenade
16 copies - 3.2 average
Shatter
14 copies - 2.8 average
City of Brass
12 copies - 2.4 average
Scarwood Goblins
12 copies - 2.4 average
Mishra's Factory
12 copies - 2.4 average
Goblin King
11 copies - 2.2 average
Ball Lightning
10 copies - 2 average
Plateau
8 copies - 1.6 average
Blood Moon
8 copies - 1.6 average
Taiga
8 copies - 1.6 average
Disenchant
8 copies - 1.6 average
Flashfires
7 copies - 1.4 average
Fork
6 copies - 1.2 average
Goblin Shrine
6 copies - 1.2 average