Most played cards in Thalia, Guardian of Thraben:

2 Decks
Hokori, Dust Drinker
2 copies - 1 average
Ghost Quarter
2 copies - 1 average
Windbrisk Heights
2 copies - 1 average
Cavern of Souls
2 copies - 1 average
Celestial Crusader
2 copies - 1 average
Angel of Jubilation
2 copies - 1 average
Wispmare
2 copies - 1 average
Fiend Hunter
2 copies - 1 average
Frontline Medic
2 copies - 1 average
Hero of Bladehold
2 copies - 1 average
Secluded Steppe
2 copies - 1 average
Enlightened Tutor
2 copies - 1 average
Honor of the Pure
2 copies - 1 average
Umezawa's Jitte
2 copies - 1 average
Oblivion Ring
2 copies - 1 average
Land Tax
2 copies - 1 average
Skullclamp
2 copies - 1 average
Thorn of Amethyst
2 copies - 1 average
Armageddon
2 copies - 1 average
Path to Exile
2 copies - 1 average