Most played cards in Faeries:

5 Decks
Preordain
16 copies - 3.2 average
Counterspell
16 copies - 3.2 average
Spellstutter Sprite
16 copies - 3.2 average
Delver of Secrets
16 copies - 3.2 average
Spire Golem
15 copies - 3 average
Hydroblast
15 copies - 3 average
Ninja of the Deep Hours
15 copies - 3 average
Ponder
14 copies - 2.8 average
Snap
12 copies - 2.4 average
Daze
9 copies - 1.8 average
Faerie Miscreant
8 copies - 1.6 average
Cloud of Faeries
8 copies - 1.6 average
Stormbound Geist
6 copies - 1.2 average
Curse of the Bloody Tome
5 copies - 1 average
Annul
5 copies - 1 average
Darksteel Citadel
4 copies - 0.8 average
Great Furnace
4 copies - 0.8 average
Brainstorm
4 copies - 0.8 average
Atog
4 copies - 0.8 average
Tree of Tales
4 copies - 0.8 average