Most played cards in Goblins:

6 Decks
Goblin Lackey
23 copies - 3.83 average
Cavern of Souls
22 copies - 3.67 average
Goblin Matron
16 copies - 2.67 average
Aether Vial
16 copies - 2.67 average
Goblin Ringleader
16 copies - 2.67 average
Goblin Warchief
16 copies - 2.67 average
Wasteland
16 copies - 2.67 average
Bloodstained Mire
15 copies - 2.5 average
Goblin Chieftain
14 copies - 2.33 average
Krenko, Mob Boss
12 copies - 2 average
Thalia, Guardian of Thraben
12 copies - 2 average
Goblin Piledriver
12 copies - 2 average
Leyline of Sanctity
12 copies - 2 average
Path to Exile
9 copies - 1.5 average
Wear // Tear
9 copies - 1.5 average
Mogg War Marshal
9 copies - 1.5 average
Mental Misstep
8 copies - 1.33 average
Scalding Tarn
8 copies - 1.33 average
Wooded Foothills
8 copies - 1.33 average
Siege-Gang Commander
8 copies - 1.33 average