Most played cards in Killian, Ink Duelist:

2 Decks
Snow-Covered Plains
8 copies - 4 average
Snow-Covered Swamp
4 copies - 2 average
Sejiri Shelter
2 copies - 1 average
Shelter
2 copies - 1 average
Inquisition of Kozilek
2 copies - 1 average
Steelshaper's Gift
2 copies - 1 average
Benevolent Bodyguard
2 copies - 1 average
Flawless Maneuver
2 copies - 1 average
Silverquill Command
2 copies - 1 average
Fatal Push
2 copies - 1 average
Eliminate
2 copies - 1 average
Dismember
2 copies - 1 average
Emerge Unscathed
2 copies - 1 average
Enlightened Tutor
2 copies - 1 average
Thoughtseize
2 copies - 1 average
Fight as One
2 copies - 1 average
Utter End
2 copies - 1 average
Nihil Spellbomb
2 copies - 1 average
Mox Amber
2 copies - 1 average
On Thin Ice
2 copies - 1 average