Most played cards in Burn:

5 Decks
Lightning Bolt
20 copies - 4 average
Red Elemental Blast
19 copies - 3.8 average
Chain Lightning
16 copies - 3.2 average
Mishra's Factory
15 copies - 3 average
Blood Moon
14 copies - 2.8 average
Fireball
13 copies - 2.6 average
Stone Rain
10 copies - 2 average
Shatter
8 copies - 1.6 average
Plateau
8 copies - 1.6 average
Disintegrate
8 copies - 1.6 average
Goblin Balloon Brigade
8 copies - 1.6 average
Earthquake
7 copies - 1.4 average
Nevinyrral's Disk
7 copies - 1.4 average
Ironclaw Orcs
7 copies - 1.4 average
Disenchant
7 copies - 1.4 average
Ball Lightning
6 copies - 1.2 average
Black Vise
6 copies - 1.2 average
Wheel of Fortune
5 copies - 1 average
Strip Mine
5 copies - 1 average
Flashfires
5 copies - 1 average