Most played cards in Shu Yun, the Silent Tempest:

2 Decks
Dig Through Time
2 copies - 1 average
Daze
2 copies - 1 average
Counterspell
2 copies - 1 average
Enlightened Tutor
2 copies - 1 average
Force of Will
2 copies - 1 average
Izzet Charm
2 copies - 1 average
Gitaxian Probe
2 copies - 1 average
Counterflux
2 copies - 1 average
Council's Judgment
2 copies - 1 average
Spellskite
2 copies - 1 average
Snapcaster Mage
2 copies - 1 average
Stoneforge Mystic
2 copies - 1 average
Ancestral Vision
2 copies - 1 average
Condescend
2 copies - 1 average
Brainstorm
2 copies - 1 average
Mana Leak
2 copies - 1 average
Memory Lapse
2 copies - 1 average
Stifle
2 copies - 1 average
Spell Pierce
2 copies - 1 average
Sleight of Hand
2 copies - 1 average