Most played cards in Storm:

5 Decks
Dark Ritual
20 copies – 4 avg
Thoughtseize
20 copies – 4 avg
Lion's Eye Diamond
20 copies – 4 avg
Lotus Petal
20 copies – 4 avg
Vault of Whispers
16 copies – 3.2 avg
Urza's Saga
16 copies – 3.2 avg
Duress
16 copies – 3.2 avg
Infernal Tutor
16 copies – 3.2 avg
Mox Opal
16 copies – 3.2 avg
Beseech the Mirror
13 copies – 2.6 avg
Mishra's Bauble
12 copies – 2.4 avg
Wishclaw Talisman
11 copies – 2.2 avg
Cabal Ritual
10 copies – 2 avg
Tendrils of Agony
8 copies – 1.6 avg
Leyline of the Void
8 copies – 1.6 avg
Chrome Mox
8 copies – 1.6 avg
Surgical Extraction
8 copies – 1.6 avg
Feed the Swarm
6 copies – 1.2 avg
Fatal Push
6 copies – 1.2 avg
Abrupt Decay
5 copies – 1 avg