Most played cards in Counterburn:

3 Decks
Counterspell
12 copies - 4 average
Chain Lightning
12 copies - 4 average
Serendib Efreet
12 copies - 4 average
Lightning Bolt
12 copies - 4 average
Volcanic Island
11 copies - 3.67 average
Psionic Blast
10 copies - 3.33 average
Shatter
8 copies - 2.67 average
Mishra's Factory
7 copies - 2.33 average
Red Elemental Blast
7 copies - 2.33 average
City of Brass
7 copies - 2.33 average
Blood Moon
7 copies - 2.33 average
Control Magic
6 copies - 2 average
Psychic Purge
6 copies - 2 average
Earthquake
6 copies - 2 average
Blue Elemental Blast
6 copies - 2 average
Badlands
5 copies - 1.67 average
Energy Flux
4 copies - 1.33 average
Flying Men
4 copies - 1.33 average
Ironclaw Orcs
4 copies - 1.33 average
Fireball
3 copies - 1 average