Most played cards in B/W Aggro:

1 Decks
Spectral Procession
4 copies - 4 average
Tidehollow Sculler
4 copies - 4 average
Windbrisk Heights
4 copies - 4 average
Thoughtseize
4 copies - 4 average
Leyline of the Void
4 copies - 4 average
Zealous Persecution
4 copies - 4 average
Marsh Flats
4 copies - 4 average
Path to Exile
4 copies - 4 average
Fetid Heath
4 copies - 4 average
Bitterblossom
4 copies - 4 average
Figure of Destiny
4 copies - 4 average
Caves of Koilos
4 copies - 4 average
Glorious Anthem
4 copies - 4 average
Kitchen Finks
4 copies - 4 average
Ajani Goldmane
3 copies - 3 average
Baneslayer Angel
3 copies - 3 average
Burrenton Forge-Tender
3 copies - 3 average
Doom Blade
2 copies - 2 average
copies - 0 average