Most played cards in Kefnet the Mindful:

3 Decks
Snow-Covered Island
33 copies - 11 average
Repulse
3 copies - 1 average
Temporal Manipulation
3 copies - 1 average
Fact or Fiction
3 copies - 1 average
Remand
3 copies - 1 average
Sapphire Medallion
3 copies - 1 average
Jace, the Mind Sculptor
3 copies - 1 average
Opt
3 copies - 1 average
Time Warp
3 copies - 1 average
Gitaxian Probe
3 copies - 1 average
Spell Snare
3 copies - 1 average
Miscalculation
3 copies - 1 average
Academy Ruins
3 copies - 1 average
Memory Lapse
3 copies - 1 average
Mana Leak
3 copies - 1 average
Cryptic Command
3 copies - 1 average
Gush
3 copies - 1 average
Into the Roil
3 copies - 1 average
Force of Will
3 copies - 1 average
Teferi, Temporal Archmage
3 copies - 1 average