Most played cards in Naya:

3 Decks
Battle Screech
12 copies - 4 average
Presence of Gond
12 copies - 4 average
Soul's Attendant
12 copies - 4 average
Soul Warden
12 copies - 4 average
Midnight Guard
12 copies - 4 average
Benevolent Bodyguard
11 copies - 3.67 average
Commune with the Gods
11 copies - 3.67 average
Wind-Scarred Crag
10 copies - 3.33 average
Prismatic Strands
9 copies - 3 average
Ash Barrens
8 copies - 2.67 average
Faithless Looting
8 copies - 2.67 average
Oblivion Ring
7 copies - 2.33 average
Khalni Garden
7 copies - 2.33 average
Blossoming Sands
7 copies - 2.33 average
Survivors' Encampment
6 copies - 2 average
Rally the Peasants
6 copies - 2 average
Spidersilk Armor
6 copies - 2 average
Standard Bearer
6 copies - 2 average
Selesnya Sanctuary
6 copies - 2 average
Electrickery
6 copies - 2 average