Most played cards in B/R Aggro:

6 Decks
Flame Javelin
20 copies - 3.33 average
Lash Out
20 copies - 3.33 average
Graven Cairns
20 copies - 3.33 average
Demigod of Revenge
20 copies - 3.33 average
Auntie's Hovel
20 copies - 3.33 average
Tarfire
16 copies - 2.67 average
Festercreep
16 copies - 2.67 average
Fulminator Mage
16 copies - 2.67 average
14 copies - 2.33 average
Firespout
12 copies - 2 average
Bitterblossom
12 copies - 2 average
Reflecting Pool
11 copies - 1.83 average
Shriekmaw
10 copies - 1.67 average
Murderous Redcap
10 copies - 1.67 average
Spitebellows
9 copies - 1.5 average
Makeshift Mannequin
9 copies - 1.5 average
Puncture Blast
8 copies - 1.33 average
Boggart Ram-Gang
8 copies - 1.33 average
Nameless Inversion
8 copies - 1.33 average
Thoughtseize
8 copies - 1.33 average