Most played cards in Gruul Aggro:

2 Decks
Werebear
8 copies - 4 average
Lightning Bolt
8 copies - 4 average
Wild Mongrel
8 copies - 4 average
Faithless Looting
8 copies - 4 average
Golgari Brownscale
8 copies - 4 average
Basking Rootwalla
8 copies - 4 average
Rugged Highlands
8 copies - 4 average
Pyroblast
6 copies - 3 average
Evolving Wilds
6 copies - 3 average
Fiery Temper
6 copies - 3 average
Blastoderm
6 copies - 3 average
Rancor
6 copies - 3 average
Arrogant Wurm
6 copies - 3 average
Tranquility
6 copies - 3 average
Electrickery
5 copies - 2.5 average
Curse of the Pierced Heart
4 copies - 2 average
Lightning Axe
4 copies - 2 average
Relic of Progenitus
3 copies - 1.5 average
Ancient Grudge
3 copies - 1.5 average
Flame Jab
3 copies - 1.5 average