Most played cards in Goblins:

2 Decks
Sacred Foundry
8 copies - 4 average
Goblin Chainwhirler
8 copies - 4 average
Clifftop Retreat
8 copies - 4 average
Lava Coil
7 copies - 3.5 average
Banefire
7 copies - 3.5 average
Legion Warboss
7 copies - 3.5 average
Siege-Gang Commander
6 copies - 3 average
Goblin Cratermaker
6 copies - 3 average
Rekindling Phoenix
4 copies - 2 average
Runaway Steam-Kin
4 copies - 2 average
Radiant Destiny
4 copies - 2 average
Volley Veteran
4 copies - 2 average
Ixalan's Binding
4 copies - 2 average
Shivan Fire
4 copies - 2 average
Skirk Prospector
4 copies - 2 average
Fight with Fire
4 copies - 2 average
Dismissive Pyromancer
3 copies - 1.5 average
Fanatical Firebrand
3 copies - 1.5 average
Conclave Tribunal
3 copies - 1.5 average
Response // Resurgence
3 copies - 1.5 average