Most played cards in Chandra, Fire of Kaladesh:

3 Decks
Magma Jet
3 copies - 1 average
Lightning Strike
3 copies - 1 average
Price of Progress
3 copies - 1 average
Seething Song
3 copies - 1 average
Punishing Fire
3 copies - 1 average
Lightning Bolt
3 copies - 1 average
Incinerate
3 copies - 1 average
Char
3 copies - 1 average
Collective Defiance
3 copies - 1 average
Dead // Gone
3 copies - 1 average
Flame Javelin
3 copies - 1 average
Sudden Shock
3 copies - 1 average
Sweltering Suns
3 copies - 1 average
Chandra, Torch of Defiance
3 copies - 1 average
Koth of the Hammer
3 copies - 1 average
Ruby Medallion
3 copies - 1 average
Sulfuric Vortex
3 copies - 1 average
Chandra, Pyromaster
3 copies - 1 average
Chandra, Flamecaller
3 copies - 1 average
Urza's Rage
3 copies - 1 average