Most played cards in Goblins:

3 Decks
Goblin Digging Team
12 copies - 4 average
Scarwood Goblins
12 copies - 4 average
Goblins of the Flarg
12 copies - 4 average
Lightning Bolt
12 copies - 4 average
Chain Lightning
12 copies - 4 average
Goblin Balloon Brigade
12 copies - 4 average
Goblin Grenade
12 copies - 4 average
Red Elemental Blast
10 copies - 3.33 average
Shatter
8 copies - 2.67 average
Taiga
8 copies - 2.67 average
City of Brass
8 copies - 2.67 average
Goblin King
7 copies - 2.33 average
Tsunami
6 copies - 2 average
Goblin Shrine
6 copies - 2 average
Flashfires
6 copies - 2 average
Blood Moon
5 copies - 1.67 average
Ball Lightning
5 copies - 1.67 average
Mishra's Factory
4 copies - 1.33 average
Plateau
4 copies - 1.33 average
Disenchant
4 copies - 1.33 average