Most played cards in Naya Zenith:

1 Decks
Knight of the Reliquary
4 copies - 4 average
Windswept Heath
4 copies - 4 average
Swords to Plowshares
4 copies - 4 average
Endurance
4 copies - 4 average
Urza's Saga
4 copies - 4 average
Wasteland
4 copies - 4 average
Green Sun's Zenith
4 copies - 4 average
Wooded Foothills
3 copies - 3 average
Deafening Silence
3 copies - 3 average
Taiga
3 copies - 3 average
Noble Hierarch
2 copies - 2 average
Sylvan Library
2 copies - 2 average
Minsc & Boo, Timeless Heroes
2 copies - 2 average
Lightning Bolt
2 copies - 2 average
Prismatic Ending
2 copies - 2 average
Force of Vigor
2 copies - 2 average
Red Elemental Blast
2 copies - 2 average
Surgical Extraction
2 copies - 2 average
Pyroblast
2 copies - 2 average
Savannah
2 copies - 2 average