Most played cards in Narset, Enlightened Master:

4 Decks
Mana Leak
4 copies - 1 average
Remand
4 copies - 1 average
Memory Lapse
4 copies - 1 average
Brainstorm
4 copies - 1 average
Wasteland
4 copies - 1 average
Volcanic Island
4 copies - 1 average
Tundra
4 copies - 1 average
Plateau
4 copies - 1 average
Council's Judgment
4 copies - 1 average
Swords to Plowshares
4 copies - 1 average
Time Warp
4 copies - 1 average
Dig Through Time
4 copies - 1 average
Ancestral Vision
4 copies - 1 average
Jace, the Mind Sculptor
4 copies - 1 average
Ajani Vengeant
4 copies - 1 average
Force of Will
4 copies - 1 average
Cryptic Command
4 copies - 1 average
Marsh Flats
4 copies - 1 average
Preordain
4 copies - 1 average
Unexpectedly Absent
4 copies - 1 average