Most played cards in Goblins:

2 Decks
Goblin Digging Team
8 copies - 4 average
Chain Lightning
8 copies - 4 average
Taiga
8 copies - 4 average
Lightning Bolt
8 copies - 4 average
Scarwood Goblins
8 copies - 4 average
Goblins of the Flarg
8 copies - 4 average
Goblin Balloon Brigade
8 copies - 4 average
Goblin Grenade
8 copies - 4 average
Shatter
6 copies - 3 average
Goblin King
6 copies - 3 average
Red Elemental Blast
6 copies - 3 average
Goblin Shrine
6 copies - 3 average
Tsunami
6 copies - 3 average
Flashfires
6 copies - 3 average
City of Brass
4 copies - 2 average
Winter Orb
4 copies - 2 average
Tranquility
2 copies - 1 average
Mox Ruby
2 copies - 1 average
Ball Lightning
2 copies - 1 average
Wheel of Fortune
2 copies - 1 average