Most played cards in Gruul Aggro:

3 Decks
Wild Mongrel
12 copies - 4 average
Werebear
12 copies - 4 average
Basking Rootwalla
12 copies - 4 average
Rugged Highlands
12 copies - 4 average
Golgari Brownscale
12 copies - 4 average
Lightning Bolt
12 copies - 4 average
Faithless Looting
11 copies - 3.67 average
Fiery Temper
9 copies - 3 average
Blastoderm
9 copies - 3 average
Tranquility
9 copies - 3 average
Evolving Wilds
9 copies - 3 average
Pyroblast
9 copies - 3 average
Arrogant Wurm
9 copies - 3 average
Rancor
9 copies - 3 average
Electrickery
8 copies - 2.67 average
Lightning Axe
6 copies - 2 average
Tin Street Hooligan
5 copies - 1.67 average
Relic of Progenitus
4 copies - 1.33 average
Ancient Grudge
4 copies - 1.33 average
Curse of the Pierced Heart
4 copies - 1.33 average