Most played cards in Esper Midrange:

1 Decks
Murktide Regent
4 copies - 4 average
Wasteland
4 copies - 4 average
Force of Will
4 copies - 4 average
Ponder
4 copies - 4 average
Brainstorm
4 copies - 4 average
Orcish Bowmasters
4 copies - 4 average
Swords to Plowshares
4 copies - 4 average
Daze
4 copies - 4 average
Flooded Strand
4 copies - 4 average
Triumph of Saint Katherine
3 copies - 3 average
Lórien Revealed
3 copies - 3 average
Pest Control
3 copies - 3 average
Tundra
3 copies - 3 average
Thoughtseize
2 copies - 2 average
Flusterstorm
2 copies - 2 average
Force of Negation
2 copies - 2 average
Hydroblast
2 copies - 2 average
Nihil Spellbomb
2 copies - 2 average
Underground Sea
2 copies - 2 average
Spell Pierce
2 copies - 2 average