Most played cards in 4c Aggro:

1 Decks
Lightning Bolt
4 copies - 4 average
Kird Ape
4 copies - 4 average
Swords to Plowshares
4 copies - 4 average
Disenchant
4 copies - 4 average
Tropical Island
4 copies - 4 average
Birds of Paradise
4 copies - 4 average
Taiga
4 copies - 4 average
City of Brass
4 copies - 4 average
Psionic Blast
3 copies - 3 average
Volcanic Island
3 copies - 3 average
Serendib Efreet
2 copies - 2 average
Red Elemental Blast
2 copies - 2 average
Blue Elemental Blast
2 copies - 2 average
Erhnam Djinn
2 copies - 2 average
Chain Lightning
2 copies - 2 average
Timetwister
1 copies - 1 average
Time Walk
1 copies - 1 average
Wheel of Fortune
1 copies - 1 average
Demonic Tutor
1 copies - 1 average
Hurkyl's Recall
1 copies - 1 average