Most played cards in Esper:

3 Decks
 ↓ Ponder
12 copies – 4 avg
↓ Brainstorm
12 copies – 4 avg
↓ Force of Will
12 copies – 4 avg
↓ Swords to Plowshares
12 copies – 4 avg
↓ Flooded Strand
12 copies – 4 avg
↓ Polluted Delta
11 copies – 3.67 avg
↓ Prismatic Ending
9 copies – 3 avg
↓ Baleful Strix
8 copies – 2.67 avg
↓ Tundra
8 copies – 2.67 avg
↓ Marsh Flats
6 copies – 2 avg
↓ Underground Sea
6 copies – 2 avg
↓ Teferi, Time Raveler
5 copies – 1.67 avg
↓ Snapcaster Mage
5 copies – 1.67 avg
↓ Void Rend
5 copies – 1.67 avg
↓ Containment Priest
4 copies – 1.33 avg
↓ Stony Silence
4 copies – 1.33 avg
↓ Spell Pierce
4 copies – 1.33 avg
↓ Cephalid Illusionist
4 copies – 1.33 avg
↓ Nomads en-Kor
4 copies – 1.33 avg
↓ Stoneforge Mystic
4 copies – 1.33 avg