Most played cards in Auras:

2 Decks
Ethereal Armor
8 copies - 4 average
Horizon Canopy
8 copies - 4 average
Spider Umbra
8 copies - 4 average
Daybreak Coronet
8 copies - 4 average
Windswept Heath
8 copies - 4 average
Gladecover Scout
8 copies - 4 average
Kor Spiritdancer
8 copies - 4 average
Slippery Bogle
8 copies - 4 average
Rancor
8 copies - 4 average
Razorverge Thicket
7 copies - 3.5 average
Leyline of Sanctity
7 copies - 3.5 average
Seal of Primordium
6 copies - 3 average
Stony Silence
6 copies - 3 average
Gaddock Teeg
6 copies - 3 average
Wooded Foothills
6 copies - 3 average
Temple Garden
5 copies - 2.5 average
Rest in Peace
5 copies - 2.5 average
Path to Exile
4 copies - 2 average
Hyena Umbra
3 copies - 1.5 average
Spirit Mantle
3 copies - 1.5 average