Most played cards in Griselbrand:

3 Decks
Snow-Covered Swamp
26 copies - 8.67 average
Basalt Monolith
3 copies - 1 average
Diabolic Edict
3 copies - 1 average
Mind Stone
3 copies - 1 average
Night's Whisper
3 copies - 1 average
Inquisition of Kozilek
3 copies - 1 average
Thought Vessel
3 copies - 1 average
Liliana of the Veil
3 copies - 1 average
Coalition Relic
3 copies - 1 average
Thoughtseize
3 copies - 1 average
Duress
3 copies - 1 average
Toxic Deluge
3 copies - 1 average
Damnation
3 copies - 1 average
Thran Dynamo
3 copies - 1 average
Expedition Map
3 copies - 1 average
Collective Brutality
3 copies - 1 average
Hymn to Tourach
3 copies - 1 average
Worn Powerstone
3 copies - 1 average
Dark Ritual
3 copies - 1 average
Cabal Coffers
3 copies - 1 average