Most played cards in Kalitas, Traitor of Ghet:

3 Decks
Snow-Covered Swamp
64 copies - 21.33 average
Hymn to Tourach
3 copies - 1 average
Innocent Blood
3 copies - 1 average
Inquisition of Kozilek
3 copies - 1 average
Go for the Throat
3 copies - 1 average
Demonic Tutor
3 copies - 1 average
Dismember
3 copies - 1 average
Fatal Push
3 copies - 1 average
Night's Whisper
3 copies - 1 average
Expedition Map
3 copies - 1 average
Bojuka Bog
3 copies - 1 average
Yahenni's Expertise
3 copies - 1 average
Toxic Deluge
3 copies - 1 average
Sign in Blood
3 copies - 1 average
Thoughtseize
3 copies - 1 average
Dark Ritual
3 copies - 1 average
Hero's Downfall
3 copies - 1 average
Vampire Hexmage
3 copies - 1 average
Phyrexian Obliterator
3 copies - 1 average
Bile Blight
3 copies - 1 average