Most played cards in Burn:

3 Decks
Lightning Bolt
12 copies - 4 average
Fireblast
11 copies - 3.67 average
Price of Progress
10 copies - 3.33 average
Lava Spike
8 copies - 2.67 average
Rift Bolt
8 copies - 2.67 average
Skewer the Critics
8 copies - 2.67 average
Monastery Swiftspear
8 copies - 2.67 average
Goblin Guide
8 copies - 2.67 average
Chain Lightning
8 copies - 2.67 average
Eidolon of the Great Revel
8 copies - 2.67 average
Smash to Smithereens
8 copies - 2.67 average
Jackal Pup
4 copies - 1.33 average
Tormod's Crypt
4 copies - 1.33 average
Anarchy
4 copies - 1.33 average
Searing Blood
4 copies - 1.33 average
Ball Lightning
4 copies - 1.33 average
Pyroblast
4 copies - 1.33 average
Firebolt
4 copies - 1.33 average
Incinerate
4 copies - 1.33 average
Ensnaring Bridge
3 copies - 1 average