Most played cards in RW Aggro:

5 Decks
Plateau
20 copies - 4 average
Lightning Bolt
20 copies - 4 average
Savannah Lions
19 copies - 3.8 average
Disenchant
19 copies - 3.8 average
Swords to Plowshares
18 copies - 3.6 average
Chain Lightning
15 copies - 3 average
Red Elemental Blast
12 copies - 2.4 average
Divine Offering
11 copies - 2.2 average
Mishra's Factory
11 copies - 2.2 average
Serra Angel
9 copies - 1.8 average
Tundra
8 copies - 1.6 average
Black Vise
8 copies - 1.6 average
Land Tax
7 copies - 1.4 average
City of Brass
7 copies - 1.4 average
Order of Leitbur
7 copies - 1.4 average
Icatian Javelineers
7 copies - 1.4 average
Volcanic Island
6 copies - 1.2 average
City in a Bottle
6 copies - 1.2 average
Granite Gargoyle
6 copies - 1.2 average
Blood Moon
5 copies - 1 average