Most played cards in UG Berserk:

2 Decks
Tropical Island
8 copies - 4 average
Giant Growth
8 copies - 4 average
Serendib Efreet
8 copies - 4 average
Unstable Mutation
7 copies - 3.5 average
Berserk
7 copies - 3.5 average
Scryb Sprites
6 copies - 3 average
Pendelhaven
6 copies - 3 average
Psionic Blast
6 copies - 3 average
Blue Elemental Blast
6 copies - 3 average
Ice Storm
5 copies - 2.5 average
Energy Flux
5 copies - 2.5 average
Llanowar Elves
5 copies - 2.5 average
Erhnam Djinn
4 copies - 2 average
Flying Men
4 copies - 2 average
Mishra's Factory
3 copies - 1.5 average
Crumble
3 copies - 1.5 average
Control Magic
3 copies - 1.5 average
Argothian Pixies
3 copies - 1.5 average
Strip Mine
2 copies - 1 average
Scavenger Folk
2 copies - 1 average