Most played cards in Esper:

1 Decks
Polluted Delta
4 copies - 4 average
Languish
4 copies - 4 average
Jace, Vryn's Prodigy
4 copies - 4 average
Prairie Stream
4 copies - 4 average
Flooded Strand
4 copies - 4 average
Sunken Hollow
4 copies - 4 average
Void Shatter
3 copies - 3 average
Reflector Mage
3 copies - 3 average
Shambling Vent
3 copies - 3 average
Spell Queller
3 copies - 3 average
Dig Through Time
3 copies - 3 average
Silumgar's Command
2 copies - 2 average
Liliana, the Last Hope
2 copies - 2 average
Dragonlord Silumgar
2 copies - 2 average
Disdainful Stroke
2 copies - 2 average
Ultimate Price
2 copies - 2 average
Kalitas, Traitor of Ghet
2 copies - 2 average
Painful Truths
2 copies - 2 average
Grasp of Darkness
2 copies - 2 average
Torrential Gearhulk
2 copies - 2 average