Most played cards in Mardu Vehicles:

1 Decks
Spire of Industry
4 copies - 4 average
Scrapheap Scrounger
4 copies - 4 average
Heart of Kiran
4 copies - 4 average
Concealed Courtyard
4 copies - 4 average
Inspiring Vantage
4 copies - 4 average
Gideon, Ally of Zendikar
4 copies - 4 average
Ammit Eternal
4 copies - 4 average
Thraben Inspector
4 copies - 4 average
Toolcraft Exemplar
4 copies - 4 average
Unlicensed Disintegration
4 copies - 4 average
Fatal Push
3 copies - 3 average
Canyon Slough
3 copies - 3 average
Lay Bare the Heart
3 copies - 3 average
Chandra, Torch of Defiance
2 copies - 2 average
Radiant Flames
2 copies - 2 average
Chandra's Defeat
2 copies - 2 average
Skysovereign, Consul Flagship
2 copies - 2 average
Declaration in Stone
2 copies - 2 average
Fumigate
2 copies - 2 average
Shambling Vent
2 copies - 2 average