Most played cards in URb Burn:

1 Decks
Volcanic Island
4 copies - 4 average
Sedge Troll
4 copies - 4 average
Counterspell
4 copies - 4 average
Mishra's Factory
4 copies - 4 average
Chain Lightning
4 copies - 4 average
Lightning Bolt
4 copies - 4 average
Serendib Efreet
4 copies - 4 average
Red Elemental Blast
3 copies - 3 average
Blue Elemental Blast
3 copies - 3 average
Black Vise
3 copies - 3 average
Shatter
3 copies - 3 average
Underground Sea
3 copies - 3 average
Boomerang
2 copies - 2 average
Energy Flux
2 copies - 2 average
Gloom
2 copies - 2 average
Psionic Blast
2 copies - 2 average
City of Brass
2 copies - 2 average
Badlands
2 copies - 2 average
Earthquake
1 copies - 1 average
Fireball
1 copies - 1 average