Most played cards in All Spells:

5 Decks
Balustrade Spy
20 copies – 4 avg
Thoughtseize
20 copies – 4 avg
Xantid Swarm
20 copies – 4 avg
Leyline of Sanctity
20 copies – 4 avg
Lotus Petal
20 copies – 4 avg
Summoner's Pact
20 copies – 4 avg
Pact of Negation
20 copies – 4 avg
Elvish Spirit Guide
20 copies – 4 avg
Turntimber Symbiosis
20 copies – 4 avg
Dark Ritual
20 copies – 4 avg
Agadeem's Awakening
20 copies – 4 avg
Narcomoeba
20 copies – 4 avg
Undercity Informer
20 copies – 4 avg
Simian Spirit Guide
20 copies – 4 avg
Force of Vigor
19 copies – 3.8 avg
Cabal Ritual
19 copies – 3.8 avg
Chrome Mox
10 copies – 2 avg
Cabal Therapy
10 copies – 2 avg
Veil of Summer
7 copies – 1.4 avg
Dread Return
5 copies – 1 avg