Most played cards in Goblins:

1 Decks
Wooded Foothills
4 copies - 4 average
Duress
4 copies - 4 average
Goblin Recruiter
4 copies - 4 average
Thalia, Guardian of Thraben
4 copies - 4 average
Wasteland
4 copies - 4 average
Cavern of Souls
4 copies - 4 average
Pyroblast
4 copies - 4 average
Once Upon a Time
4 copies - 4 average
Containment Priest
3 copies - 3 average
Kataki, War's Wage
2 copies - 2 average
Thoughtseize
2 copies - 2 average
Badlands
2 copies - 2 average
By Force
2 copies - 2 average
Surgical Extraction
2 copies - 2 average
Plateau
2 copies - 2 average
Ravenous Trap
2 copies - 2 average
Taiga
2 copies - 2 average
Swords to Plowshares
2 copies - 2 average
Mox Emerald
1 copies - 1 average
Mox Jet
1 copies - 1 average