Most played cards in Prime Speaker Zegana:

4 Decks
Scalding Tarn
4 copies - 1 average
Polluted Delta
4 copies - 1 average
Tropical Island
4 copies - 1 average
Windswept Heath
4 copies - 1 average
Counterspell
4 copies - 1 average
Venser, Shaper Savant
4 copies - 1 average
Wooded Foothills
4 copies - 1 average
Eternal Witness
4 copies - 1 average
Flooded Grove
4 copies - 1 average
Flooded Strand
4 copies - 1 average
Breeding Pool
4 copies - 1 average
Misty Rainforest
3 copies - 0.75 average
Gilded Drake
3 copies - 0.75 average
Cavern of Souls
3 copies - 0.75 average
Jace, the Mind Sculptor
3 copies - 0.75 average
Wood Elves
3 copies - 0.75 average
Lotus Cobra
3 copies - 0.75 average
Mystic Snake
3 copies - 0.75 average
Primeval Titan
3 copies - 0.75 average
Snapcaster Mage
3 copies - 0.75 average