Most played cards in Kefnet the Mindful:

4 Decks
Snow-Covered Island
33 copies - 8.25 average
Mystic Confluence
4 copies - 1 average
Opt
4 copies - 1 average
Ponder
4 copies - 1 average
Miscalculation
4 copies - 1 average
Mana Leak
4 copies - 1 average
Force of Will
4 copies - 1 average
Gitaxian Probe
4 copies - 1 average
Into the Roil
4 copies - 1 average
Pongify
4 copies - 1 average
Memory Lapse
4 copies - 1 average
Remand
4 copies - 1 average
Time Warp
4 copies - 1 average
Vedalken Shackles
4 copies - 1 average
Jace, the Mind Sculptor
4 copies - 1 average
Sapphire Medallion
4 copies - 1 average
Temporal Manipulation
4 copies - 1 average
Academy Ruins
4 copies - 1 average
Fact or Fiction
4 copies - 1 average
Repeal
4 copies - 1 average